单项选择题

He stood there silently, his lips ______.

A．trembling
B．trembled
C．were trembling
D．to be trembling
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单项选择题
With a lot of work ______, he had no time to talk with us.
A．to be done
B．to do
C．doing
D．done
单项选择题
______ a fine day, I decided to go for an outing.
A．Being
B．Having been
C．It being
D．How
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