题型:问答题 简答题 She usually helps her mother _____ housework on Sunday. [ ]A. do B. does C. for doing 查看答案
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题型:问答题 简答题 () is a measurable, verifiable work product such as specification. feasibility study report, detail document, or working prototypeA.milestoneB.deliverableC.etcD.BAC 查看答案