单项选择题

The little boy had no choice but to look on _________as his mother was seriously injured in the traffic accident.

A．help
B．helpless
C．helpness
D．helplessly
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单项选择题
Little _________that the police are about to arrest him.
A．he knows
B．he doesn't know
C．does he know
D．doesn't he know
单项选择题
I hope you''ll advise me what _________after class.
A．do
B．to do
C．doing
D．to be done
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