单项选择题

Are you going to leave______

A．the open window
B．the windows opened
C．open the windows
D．the windows open
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单项选择题
You said the books were on the desk, but______there.
A．there was no one
B．there were none
C．there were no ones
D．was none
单项选择题
Professor Li helped a lot of graduates, many of______later were successful in their fields.
A．who
B．which
C．whose
D．whom
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