单项选择题

The human body is composed of organs, each ______ a definite job to do.

A．have
B．has
C．to have
D．having
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单项选择题
He scarcely cares for anything, ______
A．doesn't he
B．does he
C．is he
D．won' t he
单项选择题
______ to the doctor right away, he might have been alive today.
A．If he went
B．Were he gone
C．Should he have gone
D．Had he gone
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