单项选择题

Helen did not go to bed early last night because she had to ______ for today's English test.

A．stay later
B．sat late
C．stay up
D．study later
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单项选择题
This year the production of the factory is ______ that of last year.
A．three times much as
B．more three times than
C．five times much as
D．five times more than
单项选择题
If a car or a train traveling at 60 miles an hour ______ from thc earth to the sun, it would take over 179 years to reach it.
A．shall go
B．will go
C．is going to go
D．went
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