单项选择题

The king was totally unaware that his reign was at ______ .

A．danger
B．question
C．stake
D．hazard
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单项选择题
She took an umbrella with her for fear that ______ .
A．it rains
B．it should rain
C．it rained
D．it be raining
单项选择题
With so much work to do, John ______ to play games last night.
A．mustn't go
B．wouldn't go
C．oughtn't to go
D．shouldn't have got
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