1 . The Russian Mir has been orbiting the Earth since 1986, and the crew is r________(更换) every two or three months. (根据中英文提示填空)

2 . Natural foods, for example, are vegetables, fruit and grain which have been grown in soil that is rich in organic matter by farmers.(改为主动语态)

3 . Tom was introducing me to the professor when I realized we were once in the same class in high school.(改为被动语态)

4 . Over the last ten years, the reputation of his company ________ greatly.

A．enhanced

B．was enhanced

C．has been enhanced

D．is being enhanced

5 . I wasn’t going to talk about money, but since it was________ , I think it’s something we should really discuss. (用bring的相关短语填空)

6 . 在登机之前，我们被要求出示身份证。（汉译英）

7 . After a heated debate，the sponsor ________of the voluntary organization.
经过激烈的辩论，这名赞助商当选为志愿者组织的主席。

8 . Guy Fawkes was c________ with treason (叛国罪) after attempting to blow up the Palace of the King and the Houses of Parliament. (根据首字母单词拼写)

9 . 他被一个邪恶的女巫改变了。
________ an evil witch.

10 . People say that the writer is writing a network novel. （改为被动语态句）
It is said that _________________________________________________.