四级Although they are both gainfully employed, they fit cleaning jobs into their nights and weekends, which is when their service is in most demand any way.
虽然他们都是有报酬的工作,但他们在晚上和周末都会做清洁工作,而这正是他们的服务需求最大的时候。
2019年6月四级真题(第一套)听力 Section A
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