1 . 尽管在历史上经历了许多兴衰起伏，中国文明仍在被传播。(被动) (汉译英)

2 . They are holding a birthday party for Tom on his sixteenth birthday. (同义句转换)
→A birthday party ________ for Tom on his sixteenth birthday.

3 . The patient __________________.
病人正在动手术。

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

5 . Look! A snowman ________by the children in the yard now.

A．is making	B．is to be made
C．has been making	D．is being made

6 . Keep silent! ________
病人正在接受检查，请保持安静。

7 . A lot of ________.
许多有趣的实验正在进行。

8 . A lecture ________ in our university now.
现在一位有名的教授正在我们学校进行演讲。

9 . Phones ________.
越来越多的青少年在使用手机。

10 . Look! The foreign guests ________ by volunteers.
看! 志愿者正在带着外国来访者参观博物馆。