4. He can neither speak ___ read French.

A. or　　　　　 　　　　 B. nor　　　　　　　　　 C. and　　　 　　　 D. but

3. I haven't heard from him ___ he left home.

A. when　　 　　　　　　　　　　 B. since　　　　　　　　 C. as　　　　 　　 D. if

2. 　　　　　you work harder, you will make some progress in chemistry.

A. If　　　　　　 　　 B. Whether　　　　　　 C. Before　　 　　　 D. Yet

1. It is late now.___ they must leave at once.

A. for　　　 　　　　　　　　 B. or　　　　　　　　　　 C. so　　　　　 　 D. because

10. I ___ go home ___ it was dark.

9. ___you are busy, you needn't do it now.

8. Great changes have taken place ___ you left.

7. He studied her ___ he joined the army.

6. Guilin is___beautiful___ Hangzhou.

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