V.

1. If we pollute the air, we will have breathing problems.

2. We will cancel our picnic because it is raining very hard.

3. Although he was sick, he did the exam very well.

4. She likes reading book.

5. He lives far from the school, but we don't.

Chúc bạn học tốt !

1. If we pollute the air, we will have breathing problems.

`->` If + S + V(hiện tại đơn), S + will/won't + V(infi).

2. Because it's raining very hard, we cancel our picnic.

`->` Because + S + V(chia thì thích hợp), S + V(chia thì thích hợp).

3. Although he was sick, he did the exam very well. 

`->` Althought + S + V(chia thì thích hợp), S + V(chia thì thích hợp)

4. She likes reading books.

`->` S + like + V_ing + ...

5. He lives far from school, but we don't.

`->` Nêu lên sự thật chia thì hiện tại đơn.