1.He had been knocking at the door for a long time,but no on

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1.He had been knocking at the door for a long time,but no one came to open it.He said to himself,"No one ____ indoors."
a.must have been b.will be c.can be d.should have been
选C,原因是什么?
2.Take ____ half you like.they are of the same size.
a.either b.every c.each d.other
选A,B,C 怎么不行
3.____ it has joined the WTO,China is meeting lots of challenges.
a.Whenever b.Unless c.For d.Now that
选择D,原因是什么?
4.____ an engineer,so he knows exactly what to do.
a.being b.having been c.as d,he is
选D.为什么A,C不对呢?
5.To improve our education system is ____ we should do right now.
a.that b.what c.how
选B.请分析下句子成分
6.Asked if he could come to the meeting that day,______.
a.nobody said anything b.nothing was said by him
c.John nodded his head and left the room
d.they didn't get an answer from him
选C 为什么?从语法上怎么解释
7.Several guards ___ at the gate of the government garden.
a.are stationed b.standing
选A.为何?station和stand用法是怎样的?怎么区分?
8.there is _____ paper in the corner of his room.
a.a plenty b.a large number of c.a pile d.dozens of
选C,数词在这怎么判断?
9.an organized businesswoman怎么翻译?
what a good memory you have for English learning!
换成how引导改怎么变？

1.由於是说话的引用,所以应是现在时态,A、B、D分别是现在完成式和将来式,只有C的时态正确.
2.应该选A,意思是"随便拿一块吧,它们都一样大",而且只有两半,either是两者选一的意思.
3.Now that是特定句式,用在句头就是这样用的,只能记住.其他的选项也不合理:Whenever是无论何时也好; Unless是除非; 但是中国加入WTO已经发生.for一般不会用在句头.
4.is an enginner中的is是说明一个人是干甚麼的,不会用完成时态,所以排除B; 而Being an enginner作为gerund后面跟整句; 但题目后面有了so,是个连接词,连接两句句子,所以前半句必须是整句,排除A、B; C的道理也是一样.
5.应该没有问题吧."是我们应该做的事情",说的是事情,应该用what.
6.Asked是被动语态,翻译上是说"被问到是否会出席那天的聚会,...约翰点头并离开房间",另一方面前半句有he,说明后半句会说明是谁.
7.stationed作形容词,表示正在驻守
8.纸不可数,排除B、C,a pile是一堆的意思; a plenty of可数,plenty of不可数
9.有条理的生意女人
补充:换成 how good a memory you have for English learning!

1.He had been knocking at the door for a long time,but no on He'd been hoping for the position for a long time.He had lon Tom had been expecting to get the job for a long time but un Someone is knocking at the door,but who can （）be.A one B he she had been at the doctor's for a long time为什么用doctor's 1.----Who is knocking at the door my boyfriend looked as if he had been ill for a long time When he woke up,he heard the ___of knocking at the door.A.so when he woke up ,he heard the ____of knocking at the door.A. Someone is knocking at the door,but who can____ be? I tried knocking at the front door but nobody ___it He lived here for a long time but had （）(few/little)friends.