Last term our maths teacher set so difficult an examination problem _____ none of us worked it out.A

题目简介

Last term our maths teacher set so difficult an examination problem _____ none of us worked it out.A

题目详情

Last term our maths teacher set so difficult an examination problem _____ none of us worked it out. 
A.thatB.asC.so thatD.which
题型:单选题难度:偏易来源:不详

答案

A
so. . . that. . . 状语从句.

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