4. 让我们去阻止那些孩子在湖里游泳吧。（stop Sb.fron！…）

3. 看太多电视对你们的眼睛有害。（be  bad for)

2. 他没有敲门就走进了她的办公室。（without knoc?king...)

1. 谢谢你帮我清洗这些窗户。（thank you for...)

7. (2013重庆中考)You can  improve your English _

practising more.

A.by B.with C.of D.in

6. (2013黑龙江齐齐哈尔中考）The Great Green Wall can stop the wind and sand to the rich land in  the south of China.

A.move B.to move C.from moving

5. (2013上海中考)The  chemicals in the vegetables and fruil are bad_our heallh.

A. from B.uith C.of D.for

4. (2013湖北黄石中考）Seeing their teacher_into the

classroom, they stopped_at once.

A.walk ；telling B.entering;to speak

Center;to tell D.walking;talking

3. (2014山东莱芫中考)We  can save money_cooking

our own meals instead of eating  outside.

A.by B.to C.for D.with

2. (2013广东广州中考）I  couldn't do it _ 一your great help-Thanks a  lot!

A. with B.without C.for D.to