题目内容

The math problem was _________ difficult __________ none of us worked it out.
A.very; thatB.too; toC.so; thatD.enough; that
C

试题分析:句意:这道数学题太难了以至于我们中谁也做不出来。so...that...如此……以至于……;too...to...太……而不能,to后接动词。故选C.
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