书面表达。

科学是推动人类发展最重要的因素，每一项发明的出现都可能对我们的生活产生重大影响，请根据下图写一篇80词左右的短文阐述你的观点。

You must be careful ________ the machine. It's dangerous.

A. to B. with C. at D. for

They could look after ________ when they were six.

A. ourselves B. themselves C. yourselves D. himself

Peter was so ________ that he made a lot of mistakes in this exam.

A. patient B. careless C. careful D. strict

-- Dad, it’s such a long way from our home to the park!

-- You mean it’s ______ to take a taxi?

A. popular B. necessary C. possible D. important

Take an umbrella to ________ your skin ________ the sun.

A. protect; from B. protect; to C. prevent; from D. prevent; to

— Has Jane done the washing yet?

— You cannot her to do such a thing.

A. want B. hope C. expect D. wish

You should ________ your shoes before you enter the dance room.

A. take off B. put off C. get off D. fall off

(2016•安徽) For our own safety, it's important to ________ the traffic rules on the way to school.

A. follow B. change C. make D. break

Excuse me, could you please ________ that cigarette?

A. put on B. put off C. put out D. put up