单项选择题

A．Paid much attention to the results of scientific discoveries.
B．Seldom introduced safety laws before disasters occurred.
C．Hardly ever looked into the causes of tragedies.
D．Imposed safety rules as soon as accidents took place.
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单项选择题
A．50 minutes.B．30 minutes.C．25 minutes.D．15 minutes.
A．50 minutes.
B．30 minutes.
C．25 minutes.
D．15 minutes.
单项选择题
A．The shorter hours they work, the higher pay they can enjoy.B．The more they work, the less leisure they can enjoy.C．The shorter hours they work, the less pay they can get.D．The greater pressure they bear, the unhappier they can be.
A．The shorter hours they work, the higher pay they can enjoy.
B．The more they work, the less leisure they can enjoy.
C．The shorter hours they work, the less pay they can get.
D．The greater pressure they bear, the unhappier they can be.
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