All his attempts to unlock the door were , because he was using the wrong key.

题型：不详难度：来源：

A．in return

B．in vain

C．in doubt

D．in time

答案

解析

考查短语辨析。in return 作为回报，in vain 白费力，白辛苦，in doubt 怀疑的，in time 及时，句意：打开这个门的所有努力白费了，因为他用错了钥匙。所以选B。

举一反三

Many of us who have never been to Egypt always associate Egypt the ancient
pyramids.

A．to

B．about

C．with

D．on

题型：不详难度：| 查看答案

_____the weather ,the sports meet will be held on time .

A．Instead of

B．In relation to

C．Regardless of

D．In favor of

题型：不详难度：| 查看答案

After that earthquake last year, we had to start ______ scratch rebuilding our houses.

A．of

B．from

C．in

D．up

题型：不详难度：| 查看答案

______other young men, he also enjoys pop music.(皖北示范)

A．In common with

B．In need

C．Compared with

D．Except for

题型：不详难度：| 查看答案

A clean environment can help the city bid for the Olympics, which will promote its economic development.

A．in nature

B．in return

C．in turn

D．in fact

题型：不详难度：| 查看答案