单项选择题

The course is very popular and the quotas are limited, so it's best to______ as soon as possible.

A．enroll
B．subscribe
C．absorb
D．register
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单项选择题
Where there are areas of high unemployment, workers tend to______ to other, wealthier parts of the country.
A．transfer
B．commute
C．emigrate
D．migrate
单项选择题
He received $ 5000 in______ for the loss of his right leg in the traffic accident.
A．refund
B．compensation
C．repayment
D．premium
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