1, c – they can fly

2, a – the North and South Poles

3, b – to make it difficult to be seen because of the skin

4, d – sleep during the day and hunt at night

5, b – spreading the seeds

E, Writing

1, If they use so much pesticide, the rivers will be polluted.

2, I suggest decorating the living room for Tet.

3, Because of her good behaviors, everybody loves her.

4, Since she had a lot of difficulties, she managed to sell the house.

5, Nga is a good English speaker.

6, I was disappointed that you didn’t phone me.

7, The weather was so bad that we had to postpone our trip.

8, Because it rained heavily, they stayed at home.

1. C

2. A

3. B

4. D

5. B

1. if they use so much pesticide, the rivers will be polluted

2. I suggest decorating the living room for tet

3. because of her good behaviors, everybody loves her

4. since she had a lot of difficulties, she managed to sell the house

hok tốt