6．The shoes cost 50 yuan.

The ________ (16) of the shoes ________ (17) 50 yuan.

5．The truck hit the tree very hard, and it fell down.

The truck hit the tree ________ (13) ________ (14)

________ (15) it fell down.

4．The box is so heavy that the little boy can't move it.

This is ________(10) ________ (11) ________ (12) box that the little boy can't move it.

3．He asked me,“Have you seen the film?”

He asked me ________ (7) ________ (8) ________ (9)seen the film.

2．They heard of the news, and hurried to school.

________ (4)they heard of the news, they went to school in ________ (5) ________ (6).

1．He said, “We don't know when the basketball game will begin?”

He said that ________ (1) ________ (2)know when the basketball game ________ (3)begin.

10．He fell ________ (sleep) after hard work.

9．The boos went of the office _________ (angry).

8．We're ________ (interest) in physics.

7．There is some ________ (difficult) in our work.