单项选择题

The scientist's discovery will have a______ influence on mankind.

A．prominent
B．promising
C．profound
D．productive
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单项选择题
The existing government has been______ great importance to the improvement of the quality of education.
A．concentrating
B．attaching
C．focusing
D．contributing
单项选择题
A year has______ and there is no sign of situation getting any better.
A．emerged
B．enclosed
C．elapsed
D．expended
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