She has been sitting there for more than 2 hours.去掉for可以吗,为什么,

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• She has been sitting there for more than 2 hours.去掉for可以吗,为什么,
• She has been sitting there for more than 2 hours.去掉for可以吗,为什么,
• 1.We () here two hours ago.We () here for tow hours A.have arrived,have been B.have come,have been接：C.came,have come D.arrived,have been2.Though it was late,()he went on with his workA.but B.and C.soD.\3.We will have a () holiday after the examA.two month B.two-months C.two-months D.two months
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