单项选择题

The headmaster went to Washington () the first time last September.

A．for
B．on
C．at
D．in

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单项选择题

About 70 percent of the population()in that country in the mountains and only 30 percent of its land () farmland.

A．lives; are
B．live; are
C．live; is
D．lives; is

单项选择题

—Excuse me, where is the nearest bookshop, please —Sorry, I don't know. —().

A．You're welcome
B．Thank you all the same
C．I'm sorry to hear that
D．Thanks a lot

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