单项选择题

The computer of the airports have helped people greatly. ______,more people travel by plane in Chin

A．A. In factB. At leastC. At one timeD. As a result
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单项选择题
Mary ______her keys in her office and she had to ______out of the house.
A．forgot, keep
B．forget, keep
C．left, be kept
D．leaved, be kept
单项选择题
Bob is not a person ______you can borrow any money though he is rich.
A．who
B．whom
C．from whom
D．from who
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