英语三级A级

单选题 He must have heard of the bad news,______________can be perceived in his expression.

A.as           
B.what            
C.while           
D.that

参考答案:A进入在线模考
【译文】从他的表情可以看出来,他一定是听说了这个消息。 
【考点】定语从句
【解析】as在这里作关系代词,引导非限定性定语从句,说明前面整句话,符合题意,故选A。

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