单项选择题

For ten years the problem about the water has not been solved; we came to think that it has been a______problem in this are

A．A. perpetualB. persuasiveC. picturesqueD. possessive
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单项选择题
Three years have______since we last met at the conference for conternet communication in Beijing.
A．elapsed
B．discerned
C．discontented
D．electrified
单项选择题
The population in last area was growing rapidly. Needless to say, the housing problem there cried out for immediate solution.
A．tried hard to find
B．called loudly
C．needed very much
D．asked earnestly for
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