单项选择题

Where there is an earthquake, energy is ________ in one area along a crack in the earth crust.

A．repelled
B．released
C．run
D．rushed
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单项选择题
I do not doubt ________ he will appear soon.
A．that
B．whether
C．if
D．whatever
单项选择题
During last decade, there have been many changes in family life. Are these changes ________
A．for the good or for the bad
B．for the worse or for the better
C．for worse or for better
D．for the worst or for the best
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