单项选择题

Do yon remember______ Professor Fan during your last visit

A) introducing
B) being introduced to
C) to have introduced to
D) to be introduced to
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单项选择题
We agreed to accept （） they thought was the best tourist guide.

A.whatever
B.whomever
C.whichever
D.whoever
单项选择题
All ______is a continuous supply of electric power.
A) that is needed
B) what is needed
C) which is most important
D) for our needs
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