2. 外语
  3. Grandparents are being used as__________babysitters by their__________children, who, on average spend six and a half hours a wee

Grandparents are being used as__________babysitters by their__________children, who, on average spend six and a half hours a wee

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问题 Grandparents are being used as__________babysitters by their__________children, who, on average spend six and a half hours a week looking after their grandchildren.
选项 A、unpaying; overworking
B、unpayed; overworked
C、unpaying; overworked
D、unpayed; overworking
答案B
解析
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