题目内容
【题目】Many old people have difficulty(sleepy), which makes them worried.
【答案】sleeping
【解析】句意：许多老人很难入睡，这使得他们很担心。have difficulty (in) doing sth做某事有困难；根据句意和所给单词，故填sleeping。
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题目内容
【题目】Many old people have difficulty(sleepy), which makes them worried.
【答案】sleeping
【解析】句意：许多老人很难入睡，这使得他们很担心。have difficulty (in) doing sth做某事有困难；根据句意和所给单词，故填sleeping。