问题标题:
Theymust-----(promise)------(look)afterthemwell
问题描述:
Theymust-----(promise)------(look)afterthemwell
卜彦龙回答:
Theymustpromisetolookafterthemwell.
他们必须承诺(发誓)要好好照顾他们.promisetodosth,承诺/发誓/答应做某事
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