单项选择题

One warning was ______ to stop her doing it.

A. suffered
B. sufficed
C. suggested
D. provided
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单项选择题
If you don' t go, I shall not ________
A. either
B. too
C. also
D. yet
单项选择题
He ______ working till he was seventy years old.
A. kept up
B. kept on
C. kept to
D. kept out
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