'Will you have a cigarette?' 'No, I ________. My doctor has forbidden me to smoke.'正确答案是mustn't, 请问老师为什么不能用shouldn't?We really_________ stop here. That sign says 'No Waiting'同样这句答案也是mustn't，为什么不能用sh...
The group of boys then decided to play a game to see who could climb to
the top of the tree first. Their mothers
were sitting not far away,looking on at their children as they played.
老师好! 上面的句子摘自一道完形填空真题，其中黑色字体主从复合句Their mothers
were sitt...
Not every graduate from an Ivy League school "makes the grade" in life; even a first-rate education is no guarantee of success. （总感觉every这里少了什么，但又说不上来，心里总想要改成Not everyone who graduates from.....，可以说一下此处very的用法或者这里省略...
While Europe’s monarchies will no doubt be smart enough to survive for some time to come, it is the British royals who have most to fear from the Spanish example."have to"本身就是必须的意思了，再加上most，“最必须”的意思，不太理解
First I stuck my papers in the entrance of a restaurant to keep them dry (no one will buy a wet newspaper). But a man came out and told me to move them because someone might trip.So I got a pasterboard box from the alley, set it on its side by the lamppost and put my papers inside. (上下文...
...”。如：“I’m just going to finish this off first.”
“Go ahead then, if you must.” “我只是打算先把这件事做完。”“如果你非得要做的话，那就继续吧。”“May I
smoke here?” “If you must, choose a seat in the smoking section.” “我可以在这儿抽...
...子。5. Michael, fool as/that he was,
completely ruined the dinner('... since he was a fool, being a
fool...')这一句是引自Quirk的1972版的“A
Grammar of contemporary English”第750页，表原因或是评论。这句话在1985版上删除了，取而代之的是这句（p1107）：Clumsy...
—Why did you call yesterday? I was out then.—To tell you I ____ a souvenir for you.A.bought B.had boughtThe two choices confuse me quite a bit. I'm wondering which sounds better to you?
原文如下：Meet
the IslandsLocated 86 km north-east of Bougainville in the South Pacific, the
Carteret Islands of Papua New Guinea are composed of low-lying islands (71) distributing (distribute) in a
horseshoe shape, with a total land area of 0.6 square kilometers and a maximum
elevation of 1.5...
...的选段。在接近结尾的地方，有一个"Thus,"②At each stage in the development of the final
product, value is added, thus creating more wealth.③There has been no rain for thirty days in the area.
Thus the crops are likely to suffer.我看到语法书对thus的定义是：thus后面是...
... impatient with her; I had not suspected that she was so neurotic a woman. Then I heard Stroeve's voice again. It seemed to break oddly on the silence."Haven't you been in bitter distress once when a helping hand was held out to you? You know how much it means. Couldn't you like to do someone a good...
...nd better, straight along--until by-and-by it grew intopositive PROOF. And then Richards put the matter at once out of hismind, for he had a private instinct that a proof once established is better left so.请教老师：如何理解这里句末的is better left so ? 什么含义呢？