◎ 题干

Professor Smith, along with his assistants, __ on the project day and night to meet the deadline.
A.work B.working C.is working D.are working
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“Professor Smith, along with his assistants, __ on the project day and night to meet the deadline.A.workB.workingC.is workingD.are working…”主要考查了你对  【可数名词及其单复数】【动名词】【表语从句】【缩写与简写】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。