单项选择题

They _______ gave us a presentation.

A．every
B．everyone
C．each
D．each one
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单项选择题
You must remember _______ this book to the library tomorrow.
A．having returning
B．return
C．to return
D．to returning
单项选择题
Huge losses on the stock market did many investors _______.
A．in
B．for
C．without
D．with
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