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
Thousands of young people have learned _________ cars.
A．drive
B．driving
C．drove
D．to drive
单项选择题
When she arrived at the crossroads (十字路口) , she went it the wrong _______.
A．direction
B．location
C．place
D．course
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