单项选择题

He demanded that we explain why things went wrong,（）

A.hadn't we
B.hadn't he
C.didn't we
D.didn't he

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（） might be expected, the response to the question was very mixed.

A.As
B.It
C.That
D.All
单项选择题
Not only Robert but also his parents （） to attend our graduation ceremony.

A.has invited
B.has been invited
C.have invited
D.have been invited
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