单项选择题

The security of the passengers is supposed to ______ by the captain.

A．see to
B．seeing to
C．be seen to
D．seen to
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单项选择题
You can borrow my book provided that you ______ it to me tomorrow.
A．return
B．returned
C．will return
D．would rectum
单项选择题
It was said that some slaves were huffed ______ in the funeral.
A．live
B．alive
C．living
D．lively
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