The plan had been ___, which made him very angry.
A.called off
B.called up
C.called in
D.called on
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You can't see the patient at the moment; he is now ___ medical treatment.
A.in
B.on
C.under
D.at
Conservative people tend to ___ traditional ideas.
A.stick to
B.reject
C.set aside
D.dislike
He is the only one of these boys who ___ the violin well.
A.play
B.plays
C.played
D.should play
The Blacks demanded that their living and working conditions ___.
A.improved
B.should improve
C.should be improved
D.were improved