单项选择题

"None of them need do any work today, ______ they" "Yes, all of them ______.

A．needn't; need
B．mustn't; must
C．need; needn't
D．need; must
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单项选择题
A big dog ran in front of my mother's car and she ______ stop very quickly.
A．ought to
B．had better
C．must
D．had to
单项选择题
He told us ______ he had done.
A．that all
B．all that
C．all which
D．what all
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