9. We all know that our teachers have different _____ of teaching.

A. way 　B. manners 　C. methods　 D. thinking

8.This is a piece of board which reads,“____without permission.”.

A. keep out 　B. keep up C. keep off 　D. keep away

7._____ all the windows are shut before you leave .

　A. Be sure of　 B. Make sure of 　C. Be sure 　D. Make sure

6. When I came in the candle burnt ____ .

A. down 　B. out C. away 　D. up

5.He shouted at me _____ his voice suddenly..

A. in the top of 　B. at the top of C. from the top of　 D. over the top of

4. What’s your reaction _____ the news? .

A. to B. in 　C. for　 D. about

3. Whenever I see Sally, I always ____ her mother. .

A. think about　 　B. think for 　C. think out 　D. think of

2. This table is different ___ the one I bought yesterday.

A. in　 　B. at 　C. from 　D. for

1. Three-fourth of the students _____ boys.

A. is 　B. are　 C. was 　D. were

15.[解析] 选C。题意为：无论何时只要你们有麻烦了，要立刻向我们需求帮助(别迟疑犹豫)。此题考查固定短语在不同语境中的应用。hesitate to do意为“做…犹豫不决(踌躇)”，是相对固定的用法。故选B.