2. ――She hasn’t telephoned us for a long.

　 -----Yes , I’m worried about her ._______?

A.　　 What do you think is she busy doing

B.　　　 What you think she is busy doing

C.　　　 What do you think she is busy doing

D.　　 What you think is she busy doing

1. It didn’t take him long ____ he worked out the problem.

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

15. 选A。指的是成堆的垃圾。

14. 选A。女儿给妈妈列举的都是自己编的事实。

13. 选D。for为并列连词，补充说明。

12. 选D。500分的平均成绩比妈妈年代的学生成绩要低得多。

11. 选A。change the topic 意为“换个话题”。

10. 选 B。 妈妈比自己想象得要聪明，也是一中幽默

9. 选B。 tell 指“分辨、辨认出”

8. 选C。可能还有别的烦恼，所以要用another