In the last ten years, they _______ three great scientific experiments.
| A．finished | B．have finished | C．had finished | D．have been finished |
第二部分：英语知识运用（共两节，满分45分）
第一节单项填空（共15小题；每小题1分，满分15分）
21. As we know, ______Potala Palace, a combination of Tibetan construction art and culture, is considered________precious treasure of China.
| A．a; a | B．the; a | C．the; the | D．a; the |
35. Between the two mounts_______and they decide to build a ropeway.
| A．lies a very deep valley | B．does a very deep valley lie |
| C．a very deep valley lies | D．a very deep valley lays |
34. They lost their way in the strange area, and________made matters worse was that their mobile phones didn’t work.
| A．that | B．what | C．it | D．Which |
33. In the yard was an old man telling stories, with quite a few children__________him.
| A．surrounding | B．surrounded | C．to surround | D．being surrounded |
32. ---What can I do for you ?
---_______you see Mr. Black, give him my regards.
| A．Had | B．Shall | C．Would | D．Should |