----I don’t mind telling you what I know

根据括号里的要求改写句子。

1. The little child needn't be looked after by them. (改为主动句)

    They ________ the little child.

2. Our English teacher often tells us to speak English in class. (改为被动句)

   We ________ often ________ speak English in class by our Eng- lish teacher.

3. The room is used to play ping-pong by people. (改为主动句)

    People ________ the room ________ ping-pong.

4. We saw a lot of students playing games on the playground. (改为被动句)

    A lot of students ________ games on the playground.

5. Li Feng made the baby stop crying. (改为被动句) 

   The baby _________ crying by Li Feng.

近年上海市政发展神速，中心区地价飙升，______清一色为豪宅集中区，低收入者大都被集中迁往外环线以______。市区的下只角是消失了，______恐怕这不是上策，______是不科学的。

填入横线部分最恰当的一项是（）。

A．几乎；外；但；或者

B．全部；内；但；因此

C．几乎；内；因而；或者

D．全部；外；因此；也

如何防治云杉上的落叶松球蚜？

要约的撤回

产科检查时( )。

A．去枕仰卧位
B．仰卧屈膝位
C．俯卧位
D．截石位
E．膝胸卧位