问题描述：
1__some doubt among the public whether the food made by some big companies is safe
A There remains B It remains C what remains D as remains
2 Bicycle are regarded as an economical alternative to buses in some cities,___ fares have increased five times in the past three years
A where B which C what D whose
3 I didn't see you at Lucy's birthday party
I would have gone,but an unexpected incident ___me
A had prevented B would have prevented C prevented D would prevent
A There remains B It remains C what remains D as remains
2 Bicycle are regarded as an economical alternative to buses in some cities,___ fares have increased five times in the past three years
A where B which C what D whose
3 I didn't see you at Lucy's birthday party
I would have gone,but an unexpected incident ___me
A had prevented B would have prevented C prevented D would prevent
问题解答：
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