单项选择题

I was out of town at the time, so I do not know exactly how it______.

A．was happening
B．happened
C．happens
D．has happened
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单项选择题
-Do you have enough to______all your daily expenses -Oh yes, enough to spare.
A．cover
B．spend
C．fill
D．offer
单项选择题
Nine in ten parents said there were significant differences in their approach to educating their children compared with______of their parents.
A．those
B．one
C．both
D．that
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