单项选择题

I can see you have put a lot of time( )it.

A．into
B．on
C．with
D．under
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--Are you done with the book I gave you --Not quite. I've read all - the last unit.
A．until
B．since
C．just
D．but
单项选择题
We've got to report ( ) to the head office.
A．on
B．in
C．back
D．/
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