单项选择题

There was no doubt __________ he was a fine scholar.

A．as
B．that
C．whether
D．if
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单项选择题
Apple trees are considered mature when they begin ________ fruit.
A．having
B．bearing
C．producing
D．making
单项选择题
They have always regarded a man of ________ and fairness as a reliable friend.
A．integrity
B．dishonesty
C．happiness
D．honest
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