2. Since she left home, I 　　　　　(not sleep)well at all.

答案:haven't been sleeping

3. The price 　　　　　(go)down, but I doubt whether it will remain so.

答案:has gone

4. When I 　　　　　(study)the book I'll write a report on it.

答案:have studied

5. I wonder why Jenny 　　　　　(not write)to us recently. We should have heard from her by now.

答案:hasn't written

6. We are sure to pass the exam because we 　　　　　(prepare)for it these days.

答案:have been preparing

7. The little girl 　　　　　(play)for several hours since she got to the beach.

答案:has been playing

8. It 　　　　　(rain)all the week.

答案:has been raining

9. They 　　　　　(not get in touch)with each other recently.

答案:haven't got in touch

10. It is the second time that he 　　　　　(be) here.

答案:has been

11. I understand what he 　　　　　(say)to me.

答案:has said

12. He 　　　　　(be)away from here for three years.

答案:has been

13. The CCTV 　　　　　　　　　　(broadcast)English programmes.

答案:has been broadcasting