单项选择题

He said it was impossible for______ a mistake in a computer' s calculation, so you can rely on that.

A．there being
B．there would be
C．there to be
D．there was
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单项选择题
More importance needs to be given to sports, and a careful choice of______ forms are most suitable should be made; this calls for close cooperation between physical education instructor and the school physician.
A．whose
B．which
C．whether
D．why
单项选择题
A．fishB．fishingC．fishesD．fisher
A．fish
B．fishing
C．fishes
D．fisher
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