How To Kill Bad Insects IELTS Listening Answers With Audio, Transcript, And Explanation

Luyện tập đề IELTS Listening Practice với How To Kill Bad Insects được lấy từ cuốn sách IELTS Actual Test 1 - Test 2 - Section 4 kèm Answer key, list từ vựng IELTS cần học trong bài đọc và Free PDF & Audio Transcript Download với trải nghiệm thi IELTS trên máy và giải thích đáp án chi tiết bằng Linearthinking
How To Kill Bad Insects IELTS Listening Answers With Audio, Transcript, And Explanation

👂️ Audio and questions

00:00
Question 1 - 5
Complete the sentences below.
Write NO MORE THAN TWO WORDS for each answer.
1
Bees that help with pollination benefit flowers and  31

.
2
Bees produce wax that can be made into candles and

.
3
Dragonflies primarily eat

.
4
Insects in summer can be harmful because they can carry such deadly diseases as malaria, 

and sleeping sickness.
5
Harmful insects may destroy crops, clothes, furniture, and even the

.
Question 6 - 10
Complete the notes below.
Write NO MORE THAN TWO WORDS for each answer.
How to kill bad Insects
Chemical Method
These solutions to insect problems are often not worthwhile because:
a) They are effective on a
6

b) They Can bring harm to
7

c) Insects become
8
to the chemicals quickly.
Biological methods
These Methods are
9
than chemical methods of eliminating harmful insects.
Breeding control method
In order to control the breeding of insects, one needs to understand the insects’
10


❓ Transcript

How To Kill Bad Insects
00:00
Good afternoon, and welcome to Insect Biology 101. I’d like to begin this course with a few remarks about good insects and bad ones. Bugs are all around us and that’s both a benefit and an annoyance - sometimes maybe even serious harm. First, let’s talk about the good things that insects do for us.
Probably the most important insect for humans, and maybe for all other life, is the bee. Bees help plants in the process of pollination, and thus are necessary to most flowers and fruit-producing trees.
That is, they carry pollen from “male” flowers to “female”. If it weren’t for bees, we’d have very few food plants and no fruit either. In fact, there would be no "we”.
No less a thinker than Albert Einstein pointed out that, without bees, humanity would be dead within a year or less. We’d starve. It’s that simple. That should maybe make us just a little humble.
A little less dramatic is the fact that bees also make the honey we eat. Moreover, they produce beeswax, which is useful in candles and it’s also used as a first-rate furniture polish.
Sure, these may not be vital to our lives, but they can serve as reminders of how important bees are. That’s a point I keep coming back to in this course. Though, in all fairness, I should point out that butterflies aid in pollination as well as bees.
Now, here in Michigan, what’s the worst part of summer? Yep, that’s right - mosquitoes. But I’m talking about helpful insects, right? So let’s look at the dragonfly first. If there were no dragonflies, there would be even more mosquitoes!
Dragonflies mainly eat mosquitoes and also a few other insects. Yes, that’s right. They don’t just fly around, and they also help to eliminate harmful insects. So, the next time you see a dragonfly, don’t you dare kill it!
Now let’s talk a little about those harmful insects. Take the mosquitoes I just mentioned as an example. Not so many years ago, mosquitoes here in America weren’t just annoying. Some were even deadly.
They carried malaria and yellow fever. My own ancestor, the Confederate General John Bell Hood, lived through the worst battles of Civil War only to die at age thirty-eight from yellow fever. A pest, not a bullet!
Well, besides the mosquitoes, in summer there is also a kind of insect that never seems tired. Right, that is the fly. Before I go on talking, I must mention an African fly called the Tsetse fly, which feeds on blood and can cause serious diseases in the people and animals that it bites.
Besides, it is still a bearer of sleeping sickness, which affects around 300,000 people every year in Africa and can be treated only with toxic drugs that are hard to administer. Worse still, the drugs sometimes don’t work.
Other insects, of course, destroy food crops. In China, for instance, locusts continue to be a danger to the harvest in some areas. Less important, but still annoying, moths eat people’s clothes and dust mites slowly destroy carpets.
Worse, but still in the home, termites or “white ants” eat wood - the wood of your house. If they are not stopped, they can eventually destroy the whole building.
Usually they seriously damage a building before anyone even notices them. So, as we all know, insects can be a real trouble.
For some decades in the West, to kill insects with chemicals seemed a good remedy. Unfortunately, chemicals can only be used in a limited area for a limited time. It’s a small-scale solution.
The insects come back. Worse still, some of the poisons used like DDT were found harmful to the environment. Many kinds of wildlife, like hawks, were harmed. And people in chemical-using rural areas have one of the highest rates of liver cancer in the world.
It’s no secret that the chemicals remain harmful to humans. Like all species, insects adapt to their changing environments at an amazing rate. When a new chemical is introduced to their habitat, the insects that survive are generally the ones with some way of resisting the harmful effects.
They then breed with the other survivors, and just like that insects become resistant to most poison in a few generations. An insect generation, remember, is a couple of months at most!
So, again we have to ask: what to do? Well, there are biological solutions. Some of these are pretty simple. One is destroying the insects’ habitat. You take away their home or food.
Cleaning your kitchen is the best way to prevent roaches. No garbage: no food. Getting rid of marshes and swamps eliminates mosquitoes. Other solutions might include bringing in dragonflies or bats in areas where mosquitoes are many.
This is a cheaper alternative to chemicals. Biological methods like this also bring no extra pollution to the environment. But you have to be careful. If you change the environment too much, you might be hurting other forms of life accidentally.
One recent method of controlling insect populations involves interrupting their breeding cycle. What does that mean? It means "birth control for bugs”. Insects are provided with food that makes them unable to reproduce.
Since they can’t have babies, the population disappears, or nearly so. And since no young are born, resistance is not a problem with no young insects developing increased resistance.
Interrupt the life cycle, eliminate the bug! It’s clear that we must have an understanding of the life cycle of the insect. At least, that’s the plan. We’ll go into more details as this course goes along. Now I will stop here to see whether you have any questions or not.

🔥 Answer key (đáp án và giải thích)

1
fruit trees
Rút gọn

Giải thích chi tiết



Mình cần nghe xem cái gì có lợi từ việc pollination của ong (ngoại trừ flowers)

=> Biết đáp án sắp tới khi nghe "Bees help plants in the process of pollination"





Sau đó nghe "thus are necessary to most flowers and fruit-producing trees."

=> Có lợi cho flowers fruit-producing trees => Đáp án: fruit trees



Xem full giải thích
2
polish/ furniture polish
Mở rộng

Giải thích chi tiết



Đáp án cần điền là cái được làm từ beeswax (ngoại trừ candles)

=> Biết đáp án sắp tới khi nghe "they produce beeswax"





Sau đó nghe "is useful in candles and it’s also used as a first-rate furniture polish"

=> Dùng cho candles và cũng được dùng như là furniture polish (chất đánh bóng nội thất) => Đáp án: polish/ furniture polish



Xem full giải thích
3
mosquitoes/mosquitos
Mở rộng

Giải thích chi tiết



Đáp án cần điền là thức ăn của con dragonflies (chuồng chuồng)

=> Biết đáp án sắp tới khi nghe "So let's look at dragonflies first"





Sau đó nghe "If there were no dragonflies, there would be even more mosquitoes!"

=> Nếu không có chuồn chuồn, sẽ có nhiều muỗi hơn => Có khả năng mosquitoes là thức ăn của dragonflies

Xem full giải thích
4
yellow fever
Mở rộng

Giải thích chi tiết



Đáp án cần điền là tên 1 loại bệnh gây chết người mà côn trùng mang tới (song song với malaria hoặc sleeping sickness)

=> BIết đáp án sắp tới khi nghe "harmful insects", "some were even deadly"





Sau đó nghe "They carried malaria and yellow fever."

=> Đáp án: yellow fever



Xem full giải thích
5
whole building/building
Mở rộng

Giải thích chi tiết



Đáp án cần điền là thứ bị côn trùng gây hại phá hủy (bên cạnh crops, clothes và furniture)

=> BIết đáp án sắp tới khi nghe "insects destroy food crops" "moths eat people’s clothes and dust mites slowly destroy carpets"





Sau đó nghe "If they are not stopped, they can eventually destroy the whole building."

=> Nếu chúng không bị ngăn chặn, chúng cuối cùng có thể phá hủy toàn bộ tòa nhà => Đáp án: (whole) building



Xem full giải thích
6
small scale/small-scale
Mở rộng

Giải thích chi tiết

Loại từ cần điền là danh từ



Nghe thấy "chemicals can only be used in a limited area for a limited time. It’s a small-scale solution"

=> Chemicals chỉ hiệu quả khi sử dụng trên quy mô nhỏ => Đáp án: small-scale



Xem full giải thích
7
humans
Mở rộng

Giải thích chi tiết

Đáp án cần điền là đối tượng bị ảnh hưởng xấu bởi hóa chất



Sau đó nghe "It’s no secret that the chem­icals remain harmful to humans. "

=> Hóa chất gây hại cho con người => Đáp án: humans



Xem full giải thích
8
resistant
Mở rộng

Giải thích chi tiết



Loại từ cần điền là tính từ (Insects become ___ to the chemicals quickly)

=> Biết đáp án sắp tới khi nghe "insects adapt to their changing environments at an amazing rate." (nói về khả năng thích nghi của insects)

Sau đó nghe "insects become resistant to most poison in a few generations."

=> Côn trùng trở nên resistant với hầu hết các poison (poison ~ chemicals) => Đáp án: resistant



Xem full giải thích
9
cheaper
Mở rộng

Giải thích chi tiết



Mình cần nghe về sự khác nhau giữa hai phương pháp

=> Biết đáp án sắp tới khi nghe "Well, there are biological solu­tions"

Sau đó nghe "This is a cheaper alternative to chemicals"

=> Đây là một giải pháp thay thế rẻ hơn cho hóa chất => Đáp án: cheaper



Xem full giải thích
10
life cycle
Mở rộng

Giải thích chi tiết



Đáp án cần điền là cái mà con người cần hiểu để thực hiện breeding control method

=> Biết đáp án sắp tới khi nghe "method of controlling insect populations involves inter­rupting their breeding cycle" (Breeding control method)

Mình được nghe là "It’s clear that we must have an understanding of the life cycle of the insect"

=> Chúng ta phải có hiểu biết về vòng đời của côn trùng

=> Đáp án: life cycle



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