【单选题】【消耗次数：1】
How stupid I have been! Why _______ I do that before?
①
don’t
②
didn’t
③
not
参考答案：
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相关题目
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I don’t know why she avoids __________ her opinion on the subject.
①
to give
②
to be given
③
giving
④
being given
【单选题】
I didn’t mean to do that. Please forgive me.____________
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Not too bad.
②
Never mind.
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It’s a pleasure.
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appeared
②
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40.—I`m sorry I didn`t do a good job. ---Never mind.____you have tried your best.
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Aboveall
②
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—Why didn’t you come to join her party?
—I______, but I had to look after my ill mother.
①
would have
②
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③
would do
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Why not buy a cheaper one, ___ you don’t have enough money?
①
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随机题目
【单选题】
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①
机床精度、几何形状精度、相对位置精度
②
尺寸精度、几何形状精度、装夹精度
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走刀路线最短
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将复杂轮廓简化成简单轮廓
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将手工编程改成自动编程
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