问题
选择题
I tried to find ________ that prevented so many people from taking part in the program.
A．why it did
B．what it was
C．that it did
D．why it was
答案
答案：B
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I tried to find ________ that prevented so many people from taking part in the program.
A．why it did
B．what it was
C．that it did
D．why it was
答案：B