单项选择题

-- _________ may I _________ the book
-- For three weeks.

A．How often, borrow
B．How often, keep
C．How long, borrow
D．How long, keep
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单项选择题
There was a second knock at the door. It was the second time I _________ that afternoon.
A．was interrupted
B．was interrupting
C．had interrupted
D．had been interrupted
单项选择题
-- Never thought to see you here.
A．So did I.
B．Oh, haven't you
C．It's a small world.
D．I'm well. Thank you. And you
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