7. He studied her ___ he joined the army.

6. Guilin is___beautiful___ Hangzhou.

5. It's ___ hot ___ I can't go to sleep.

4. Yesterday Tom didn't go to see the film ____ he went over his lessons.

3. ___ the boy watched TV, he went to bed.

2. I got to know her brother ____ I was a boy.

when, because, before, if, after, as so... that, since, as... as, not. . . until

1. Please come to my home ____ you are free tomorrow.

10. The guard will let you go in. You show him your pass.

9. I will believe it. I hear it with my own ears.

8. She tried to work out the problem by herself.　 She asked for help.