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 back) while 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 (option) to guarantee enough energy in the future.
A．solution
B．policy
C．choice
D．reason
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