Knowledge and learning are important if we want to be successful but they may also ____ our thinking.

   [ ]

A. direct    

B. limit    

C. change  

D. improve

用所给单间的适当形式填空.

1. He told he _____ (help) her with her maths the next evening.

2. She said they _____ ( know) each other for quite sometime.

3. If it _____ (not rain) tomorrow, we _____ (visit) the People's Museum.

4. John _____ (write) something when I _____ (go) to see him.

5. Our teacher told us that light _____ (travel) much faster than sound.

6. When I got to the cinema, the firm _____ (begin).

7. Mike asked me if we _____ (ask) any questions the next class.

8. Will you come and stay with us for a while when you _____ (finish) doing your homework?

9. Comrade Wang didn't know if there _____ (be) an English evening that day.

10. Please tell me if she _____ (come) again next time.