单项选择题

It was recommended that they ______ for the doctor.

A．has waited
B．waited
C．should wait
D．should have waited
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单项选择题
Our boss told me my plan was still ______ discussion.
A．in
B．under
C．of
D．with
单项选择题
In spring and summer, the most popular ______ is tennis.
A．work
B．activity
C．games
D．sport
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