在一张试卷中有这样一组对话：—Are you going to school by bus or bike?—Sometimes by bus and sometimes by bike. 问句中的 by bus or bike 应该是 by bus or by bike 的省略形式，但问题是，英语有这样的省略吗？...
下面一段话中managed，prepared，词义是什么？rules，followed.怎么翻译成:规则，服从对吗？These days,是什么意思？These days, most food in the world is safe,这句话中主语是什么？These days, most food in the...
whatever 一般都是单独使用的，如：Whatever she did was right. 她做的一切都是对的。I will just say whatever comes into my mind. 我想到什么就说什么。Whatever happens, don’t forget to write. 无论怎样别忘...
Sir Alexander Fleming did not, as legend would have it, look at the mold on a piece of cheese and get the idea for penicillin there and then.上句可改写为：Sir Alexander Fleming did not look at the mol...
If we_______200 years old,we______everything.A.were to be,could change B.had been,changed C.were,would have changed D.should be, changed.这道题，C为什么不对，从句对现在事实的虚拟，主句对过去事...