单项选择题

All（）has already been done.

A. can be done
B. should be done
C. that can be clone
D. what should be done

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Neither he nor I（）from Canada. We are from Australia.

A. is
B. are
C. am
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It is chairman of the department ______ the teaching staff elected him.
A. what



B. whom
C. which



D. that
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