单项选择题

Safety officials have earnestly questioned whether the increased use of synthetic materials heightens the risk of fire.

A．cautiously
B．severely
C．accurately
D．seriously
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单项选择题
The promised wage increase is being held backwhile it is examined by the government to see if it is greater than the law allows.
A．dismissed
B．delayed
C．neglected
D．rejected
单项选择题
Nuclear power, with all its inherent problems, is still the only optionto guarantee enough energy in the future.
A．solution
B．policy
C．choice
D．reason
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