单项选择题

Too much drinking would ______his health.

A．do harm for
B．do harmful to
C．do harm to
D．do harmful for
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单项选择题
He was______ of deciding anything for himself.
A．incapable
B．ineffective
C．incompetent
D．unable
单项选择题
We should look ______ the matter before we reach a conclusion.
A．into
B．for
C．to
D．at
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