Question

英语单选..

1.I don't think she is a teacher,is she?
She doesn't think I am a teacher,does she?
为什么is she，does she，怎么和I没有关系啊》..
具体要怎么做啊...

2.Recently the hospital has imported (C)they call a scanner,( )will be used to examine patients' internal organs.
A.waht ;that B.that ,which C.what ,which D.which ,what

3.--Michael was late for Mr.Smith's oral class this morning
--(A)?As far as I konw ,he never came late to class.
A.How come B.So what C.Why not D.What for
D为什么不行啊..

4.--The terrible accident is under investigation.
--Autually ,quicker action(D)those workers trapped in the time
A.might have saved B.must have saved
C.should have saved D.could have saved

麻烦每个选项都说下为什么。。。
谢了..

Answer 1

1。(1.)当主句的主语为第一人称时，其后的简短问句应与从句相一致。例如：
I expect our English teacher will be back this weekend, won't she/he?
值得注意的是，当这些动词后接的宾语从句的否定转移到主句时，其仍属否定句，故其后的简短问句应用肯定式，而非否定式。例如：
I don't believe that he can translate this book, can he?
(2).当主句的主语为第二、三人称时，其后的简短问句则应与主句相一致（此时，否定只看主句，与从句无关...）。例如：
Your sister supposes she needs no help, doesn't she?
You thought they could have completed the project, didn't you?

2. what代的是they call……的成分，而which则指scanner

3.how come?是“为什么”的意思，非常口语化，而“what for”也有“为什么的”意思，但是“为了什么目的”的意思

4.could来自于can表示能够 could have done 就是说“本能够做到什么”（隐含当时没能达到这个能力）

Answer 2

1:is she ?指的是,她是吗?这里的她指的是前面的she,而不是I.
does she?指的是,她是这样认为的吗?这里的她就是句首的she.

2:C-可以替换成:imported< a thing> they call a scanner.这里用what 指代<a thing =scanner>.表示什么东西.第二空,因为前面有逗号,因此不能使用that.
3:A-表示,怎么会这样?为什么呢? 而 what for 指- 用来干嘛?或者可以理解为为了一件事而去做一件事!
4：D-虚拟语气,根据句意知道,迅速反应能够解救那些被困的工人.因此可以排除其它选项! <个人意见,仅做参考>

Answer 3

B
at
once
是插入语，删去不管，delay
doing
sth.

由于下雨，我们立即打算推迟到下个月再度假

Answer 4

B因为delay后面跟名词，如果是动词的话要加ing,所以选B

Answer 5

B
delay
doing或delay
加名词

Answer 6

B
delay
doing推迟做某事