单项选择题

-- ______ are your parents
-- They are both teachers.

A．Who
B．Whom
C．What
D．Which
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单项选择题
He seems to ______ Jane. He knows her well.
A．introduce to
B．be introducing to
C．be introduced to
D．have been introduced to
单项选择题
-- Sorry, Joe. -- Don't call me Joe , I'm Mr. Parker to you, and ______ you forget it!
A．do
B．didn't
C．did
D．don't
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