英语语法题 请告诉我为什么这些题选这个答案

Question

If you stop smoking by the age of 40,your survival rate can equal ( B ) of lifelong non-smokers.
A.those B.that C.what D.which

1.When they arrived at the airport, the plane _____
A.already set off B.set off already
C.had already set off D.has already set off
2.The moon _____ around the earth.
A.move B.moves C.will move D.has moved
3.If I _____ you, I would give up the job.
A.am B.be C.was D.were
4._____ there be life on Mars?
A.May B.Can C.Might D.Ought
5.She pretended not _____ interested but her eyes betrayed her.
A.to be B.be C.being D.been
6.He aimed his gun _____ me.
A.to B.at C.on D.into
7.Stay _____ have dinner with us, will you?
A.to B.or C.and D.here
8.You can use my car, _____ you promise to be back before lunch.
A.as for as B.as much as
C.as good as D.as long as
9.Mary listened carefully _____ she might dicover exactly what John wanted.
A.so as that B.in order that
C.in case D.provided
10.A:What will you be doing in the summer?
B:_____ English in a high school.
A.To teach B.Teaching
C.Will be teaching D.Will teach

1.C 2.B 3.d 4.B 5.A
6.B 7.C 8.D 9.B 10.B

Answer 1

没有编号的那题选that是因为两者之间的比较，that 代表前面的提到的survival rate 。that of +名词可以看成是一个固定的用法,两者之间的比较，为了不重复出现同一个内容而使用that代替。
例如：The weather in Changsha is colder than that of Nanning=The weather in Changsha is colder the weather in Nanning.
1.根据前面的arrived知道描述的是过去的事情，又already一般是跟完成时一起用的，所以用过去完成时。
2.用一般现在时是因为月球围绕地球而转是一种自然现象。类似的还有太阳从东方升起等等：The sun rises from the east .这类情况时态一般都要一般现在时。
3.从后面的would很明显知道是虚拟语气，而且是对现在的虚拟。所以用were
4.表示“可能”‘会”之类的意思，所以用can。翻译就是火星上可能有生命吗？
Can it be that he is not a police “？有没有可能他不是警察叔叔（哈哈）？
It can be worse if you don't take action=It could be worse if you did not take action.注意前后对应，虚拟就全部虚拟。
could 和can 一样。
5.pretend to do sth 嘛！这是一个固定搭配。翻译：她假装并不感兴趣，但是她的眼睛出卖了她。
6.aim at sth 把目标对准。。。固定搭配。另外给你补充：aim to do sth 目的在于做某事。
she aim to kill the man.她旨在杀掉那男的。
7.两个动作的并列：stay 和 have 两个动词的并列嘛，所以用and.或者可以看成是两个动作先后连贯发生：先stay,然后再have dinner
8.as long as 是只要的意思。翻译：只要你保证在午饭前回来，你就能用我的车。
9.in order that 是为了。、、表示一种目的，后面跟一个句子。so as that 没有这种用法，只有so as to 或者so that .本句用so that 也可以。in case 是以防万一的意思。provided 假如的意思，表示一种假设。
10.问题问的是：暑假那时你会干什么呢？而且是用进行时提问的，那回答也就得要进行时。
另外，C不能选是因为没有这种表达，如果出现了will 那就应该把主语I也加上去。这是一种语言习惯。省略就要主谓一起省略，不能但是省略主语。
。。。。手好累
不明白的话可以hi 我 很乐意为你解答。

Answer 2

that、those是代词。that代survival rate of lifelong non-smokers.A equal B,从句子结构知equal 后面加的是名词，而survival rate of lifelong non-smokers是单数，所以用that，those则代复数。

1.当……时，……已经……。从句一般过去时，主句过去完成时；从句一般现在时，主句则是现在完成时。
2.当句子内容是真理，经常性发生，按一般规律是这样，只能用一般现在时。
3.从would可知是虚拟语气，所以be动词都用were。
4.can表示有可能，但可能性较小。
5.固定句型pretend (not)to be +形容词。
6.固定句型aim one's gun at sb.
7.祈使句。
8.从句意，选as long as，只要。
9.目的状语从句。A，用法是so+形容词+as that，C是以防的意思。
10 答句是省略句，完整的是 I will be teaching English in a high school in the summer.省略了主语，谓语。