I had been puzzled over the problem for over an hour without any result, ____ al

题型：不详难度：来源：

I had been puzzled over the problem for over an hour without any result, ____ all at once the solution flashed across my mind.

A．while

B．when 　　

C．then 　　

D．as

答案

解析

略

举一反三

It is ____ you deal with difficulties that shows ____ you are really like.

A．what; what

B．how; what 　　

C．how; that 　　

D．which; how

题型：不详难度：| 查看答案

Imagine life as a game ____ you are playing with five balls. You name them---work, family, health, friends and spirit.

A．where

B．that

C．as

D．which

题型：不详难度：| 查看答案

_______you can easily have lunch in the restaurant around the corner, why do you take the trouble to drive many miles here?

A．When

B．Unless

C．While

D．Where

题型：不详难度：| 查看答案

Recently Shanghai has a lot of visitors, most of _____ come to see the 2010 Shanghai Expo
being held now.

A．who

B．whom

C．them

D．they

题型：不详难度：| 查看答案

. ______ the house costs, it will be ______ it.

A．Whatever, worth	B．However, worth
C．How much, worthy of	D．What, worthy of

题型：不详难度：| 查看答案