4. After three _______ (hour) walk, he was too tired to go on.

3. They didn't make a _______ (decide) where to go.

2. The flowers sold in the supermarket are quite _______ (beauty).

1. The bookstore is very _______ (crowd) on Sundays, many students are reading in it.

6. Can you tell me _______ that's a fast train or not?

答案：1.what　2.when　3.why　4.where　5.who?6.whether

5. Could you tell me _______ is the man standing over there?

4.-Do you know _______ he gets off the bus?

-At the next stop.

3. He doesn't know _______ his father is so worried about him.　

2.-Could you tell me _______ the film begins, please?

-About six o'clock.

1. I don't know _______ I can do for you.