单项选择题

Regional unemployment and regional recession are an economic loss to the whole nation and they cannot ______ themselves on their own.

A．simplify
B．modify
C．verify
D．rectify
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单项选择题
To people's astonishment, the effort to bring the quarreling couple together again ______.
A．came off
B．came on
C．came round
D．came down
单项选择题
Since her husband lost his job, the hopes of their buying a house have ______ even further.
A．expired
B．receded
C．elapsed
D．terminated
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