4. Thank you for helping me.

3. How many students are there in your class?

2. Excuse me! May I borrow your bike?

5. They were frightened to hear some strange noise.

II. 1. What time do you usually go to school?

4. There is no plant life without lightning.

3. Turn right when you come to the crossroads.

2. A man in police uniform caught the robber at once.

5. I sit behind Joy and in front of Sandy. Where does Joy sit?

7B Unit 3-4

综合练习 (A)

I. 1. Their friend Susan lived nearby in Hill Building.

4. Which is your favourite vegetable?

3. The party we held yesterday was really great, wasn’t it?