2.What ______you _____when I called you last night?A.were ,doing B.did,do C.is ,doing D.do,

1.A
当我昨天打电话给你时你正在干什么
这是一个正在进行的动作My hobby is ________ postcards from each place I visit. A. to collecting B. to collect C. to be walkB可以填to collect 或是collecting表示我的爱好是搜集每个游览过的地方的明信片One more bridge ______ the Yangtze River in a few years’ time.A. will be built on B. will built aboveC. will be built acrossD. will be built over不介意我问你这道题吧当然不介意选D在扬子江上建起又一座桥梁我问最后一道题，问好后就采纳你的答案I’d like to buy that coat.----I’m sorry . _____ out. a. It sold b. It’s selling c. It’s been soldd. It had been soldc、d分别是什么时态的，分别用在怎样的句子中，请指教一下，谢谢！CC是现在完成时：陈述过去事情对现在的要影响D是过去完成时：用于过去的过去发生的事情