单项选择题

"I don't think Prof. Smith meant to be funny this morning, do you""No, although I couldn't help _______ at some of his remarks."

A．from laughing
B．to have laughed
C．to laugh
D．but laugh
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单项选择题
The policemen went into action _________ they heard the alarm.
A．promptly
B．presently
C．quickly
D．directly
单项选择题
We all _________ the great achievements he has made in his work.
A．adopt
B．ad, ire
C．advise
D．adjust
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