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
Mr. Grey has two sons,______ are famous dancers.
A．both they
B．both of them
C．they both
D．both of whom
单项选择题
It's a long time since he left his England, ______
A．didn't he
B．hadn't he
C．wasn't it
D．isn't it
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