单项选择题

To make this ______ clear we shall have to look closely into biology’s long history.

A．distinction
B．indication
C．recognition
D．constitution
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单项选择题
I ______ with the Browns during my stay in New York City.
A．put in
B．put down
C．put on
D．put up
单项选择题
I meant ______ you about it, but I forgot to do so.
A．telling
B．having told
C．to tell
D．to have told
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