单项选择题

He didn’t pass the final examination.He （）it.

A.must have prepared for
B.ought to prepare for
C.ought to have prepared for

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I have the complacent feeling （）I ’m hightly intelligent.

A.what
B.which
C.that
D.this

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My fish was delicious but Charles’beef had almost no（）.

A.sauce
B.smell
C.flavor
D.appetite