Question

【题目】Mum often feels worried about _____________ enough sleep because she’s getting old.

A. without having B. not having C. don’t have D. doesn’t have

Answer 1

【答案】B

【解析】句意“妈妈总是担心没有足够的睡眠，因为她老了”。空前有介词about，用doing形式，且to do/doing的否定形式，要在to do或doing前加not，根据句意，故选B。