单项选择题

Poor health and lack of money may both be to educational progress roadblocks.

A. restraints

B. stains
C. scarcities

D. barriers
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单项选择题
The two banks have announced plans to merge next year.()

A. combine
B. close
C. break
D. sell
单项选择题
It is no use debating the relative merits of this policy.
A．making
B．taking
C．discussing
D．expecting
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