_____ back problems, always bend your knees when you lift heavy objects. A.AvoidingB.To avoid C.Havi

题目简介

_____ back problems, always bend your knees when you lift heavy objects. A.AvoidingB.To avoid C.Havi

题目详情

_____ back problems, always bend your knees when you lift heavy objects.
A.AvoidingB.To avoid
C.Having avoidedD.To be avoiding
题型:单选题难度:偏易来源:不详

答案

B
用于句首表示目的,要用不定式。句意为:为了避免以后出现问题,当你搬动重东西时,一定要将膝盖弯曲着。

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