3. A

- comprise = consist of (v.): bao gồm.

4. A

- allow = permit (v.): cho phép.

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1. We couldn't swim because the water was very cold.

- S + couldn't + V (Bare).

- Because + S + V: Bởi vì ...

2. They have never been to England.

- This is the first time + S + have/ has + V (Pii) = S + have/ has + never + V (Pii).

3. He will be met at the station by us.

- S + will + be + V (Pii) + (by O).

4. A local firm is going to rebuild our house.

- S + to be + going to + V (Bare).

5. I wish I had a computer.

- S + wish (es) + (that) + S + V (Lùi thì).

6. How long has their work been done?

- Have/ Has + S + have/ has + been + V (Pii)>

7. He wasn't invited to the party last night.

- S + was/ were + (not) + V (Pii) + (by O).

8. Spending the weekend in the countryside is very exciting.

- S + to be + adj + to  V = Gerund + to be + adj.