题目内容
The ups and downs due to the expansion and contraction of the economy constitute the _____（）
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In contrast to the “right-versus-right” problem posed by an ethical dilemma, the problem posed by a（n） _____ entails a “right-versus-wrong” decision（）
Jo and Laurie first met_______（）
Who did Alice meet when she got to a tea party（）
Robinson was a ______ in Africa for two years（）
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