单项选择题

The Space Age ______ in October 1957 when the first artificial satellite was launched by the Soviet Union.

A．initiated
B．originated
C．embarked
D．commenced
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单项选择题
Take an umbrella with you in case ______.
A．it will rain
B．it rains
C．it raining
D．it rained
单项选择题
None of the Party agrees the idea ______ is offered by the wise leader.
A．which
B．that
C．as
D．but
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