问题
What shall human beings do if oil_______sometime in the future?
A:will run out
B:runs out of
C:runs out
D:will be run out
B:runs out of
C:runs out
D:will be run out
正确答案是：
同类题型
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he sleeps all day, he is very lazy.
stepped out of the church, the clock hadjust ______ eleven
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