单项选择题

Nobody but Sam and Tom ______ in the lab.

A．are
B．have been
C．were
D．is
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单项选择题
I shall have a roommate in the house after all these ______ years.
A．single
B．alone
C．sole
D．lonely
单项选择题
Last year, hundreds of college students applied for the New Times Cup English Speech
A．Argument
B．Quarrel
C．Debate
D．Contest
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