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
She was talking about her _______as a nurse in a hospital, which we had never heard of.
A．expenses
B．excuses
C．experiences
D．expressions
单项选择题
The wine _________a little bitter this time.
A．tastes
B．sounds
C．looks
D．feels
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