---Whycan'tAnncometomypartytonight?---Shehastostudy________hersc

发布时间：2020-08-04 19:39:24

--- Why can't Ann e to my party tonight?--- She has to study ________ her science test ________ Tuesday morning.A.for; atB.of; atC.for; onD.of; on

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C解析study for...为……而学习，具体的某一天前用介词on。
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