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
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单项选择题
He told us ______ he had done.
A．that all
B．all that
C．all which
D．what all
单项选择题
______ country in the world should do her best to keep the world peace.
A．Each
B．All
C．Every
D．Everyone
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