单项选择题

The morning class ______over, students rushed out of the classroom for lunch.

A．was
B．is
C．having been
D．being
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单项选择题
As I was just getting familiar with this job, I had ______to ask my boss.
A．many
B．most
C．much
D．more
单项选择题
Most trains______ long distances have a dining car and a club car where refreshments are served.
A．to go
B．to be going
C．that goes
D．going
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