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试题详情及答案解析

We have to the questions before answering them.

A．look after	B．look up
C．look through	D．look at

答案：C

试题分析：句意为：在回答问题之前我们必须浏览问题。look after：照顾、照看， look up：（在词典中）查找， look through ：浏览， look at：看（某物）。根据语境可知应选C。
考点：考查动词短语辨析。