单项选择题

I didn't ______ that these days he was especially busy.

A．pay attention to
B．notice
C．recognize
D．guess
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单项选择题
This cloth is obviously ______ real silk.
A．inferior than
B．inferior to
C．inferior for
D．inferior on
单项选择题
How close parents are to their children ______ a strong influence on the character of the children.
A．have
B．has
C．having
D．to have
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