Some investigations show that the cause of the accident may
Some investigations show that the cause of the accident may be the car engine's__.
a.fail to operate
b.failure to operate
c.fail in operation
选哪个?为什么?
a.fail to operate
b.failure to operate
c.fail in operation
选哪个?为什么?
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failure to operate
car's engine need to be followed by a noun
car's engine need to be followed by a noun
1年前
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