单项选择题

Wait until you are more ______ . It's better to be sure than sorry.

A．inspired
B．satisfied
C．calm
D．certain
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单项选择题
He left ______ with my secretary that he would call again in the afternoon. He said he would keep ______ .
A．words; his words
B．word; his word
C．word; word
D．the word; his words
单项选择题
—Must we do it now—No, you ______ .
A．won't
B．needn't
C．can't
D．don't
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