单项选择题

I was really worried about you. You ______ home without a word.

A．mustn't leave
B．shouldn't have left
C．couldn't have left
D．needn't leave
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单项选择题
In cold climates, the wood-frame dwelling, properly built and insulated, ______ warmest type of home.
A．and the
B．the
C．is the
D．where it is the
单项选择题
What do you think of the company's forecast Oh, the news ______ pretty good.
A．were
B．is
C．are
D．had been
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