单项选择题

He found it necessary for us______ from each other.

A．to help and learn
B．helping and learning
C．to learn and to help
D．learning and helping
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单项选择题
Our team______ the match yesterday.
A．won
B．beat
C．defeated
D．caught
单项选择题
I am looking forward to______ from you as soon as possible.
A．hear
B．be hearing
C．hearing
D．have heard
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