问题
选择题
They learned it all by themselves. That is to say nobody told them ________. [ ]
A. how to do it
B. what to do it
C. where to do
D. when to do
答案
答案：A
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They learned it all by themselves. That is to say nobody told them ________. [ ]
A. how to do it
B. what to do it
C. where to do
D. when to do
答案：A