题目内容
不久,一架直升飞机抵达失事现场,来搭救这几个幸存者。
It was _________________ a helicopter arrived ____________________ the survivors of the plane crash.
not long before; on the spot to recue
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题目内容
不久,一架直升飞机抵达失事现场,来搭救这几个幸存者。
It was _________________ a helicopter arrived ____________________ the survivors of the plane crash.
not long before; on the spot to recue