______the road ,don’t forget to look both ways.A．As crossingB．While you crossC．W

题型：不详难度：来源：

______the road ,don’t forget to look both ways.

A．As crossing	B．While you cross
C．While crossing	D．Cross

答案

解析

这题考查时间状语从句的省略式，当主从句的主语一样时，可以省略从句的主语和be动词，这题的while crossing就省略了you are，句意是：当你过马路时，别忘了两边看看。选C。

举一反三

That’s the new machine ______ parts are too small to be seen.

A．that

B．which

C．whose

D．What

题型：不详难度：| 查看答案

Part of the reason Charles Dickens loved his own novel, David Copperfield, was ______ it was rather closely modeled on his own life.

A．what

B．that

C．why

D．whether

题型：不详难度：| 查看答案

Some researchers believe that there is no doubt ____ a cure for AIDS will be found.

A．which

B．what

C．that

D．whether

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is expected, according to the online survey, is that housing prices can’t go up any more.

A．Which

B．What

C．It

D．As

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Please leave your phone number ______ we can get in touch with you in case of emergency.

A．so that

B．on condition that

C．for fear that

D．so long as

题型：不详难度：| 查看答案