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题目内容
（成都理工大学大学英语试卷）
5.(单选题)Nobody told us _____(本题3.0分)
A. what to do it
B. how to do
C. where to do
D. when to do it
A. what to do it
B. how to do
C. where to do
D. when to do it
参考答案
