没有解题的理由,请从语法和考点的角度来解释.

没有解题的理由,请从语法和考点的角度来解释.
1.-The famous singer was given 1000 dollars for a single______.
A.appear B.appearance.c.disappear D.disappearance
2.-So you mean i have been too strict with you?
-Well,if i_____say so
A.must B.mustn't C.needn'tD.may not
3.-Students today are writing_____of poetry.
A.a great many lines B.quantities of lines C.Lots lines D.a large number
4.You unknock the door_____turning the key_____right.
A.by;to B.by;on C.in;on D.in;to.
5.As a result of heavy snow,the highway has been closed up until further______.
A.news B.information C.notice D.message
6.Good technique in medicine means less pain and fewer deaths and,____,it is our duty to master it.
A.altogether B.there for C.otherwise D.however
7.Mother was worried because little Alice was ill,especial_____Father was away in France.
A.as B.that C.during D.if
8._____is done cannot be undone.
A.How B.That C.What D.Where
9.Take care ____you don't make mistakes in the coming exam.
A:of that B.about that C.for what D.that
10.___we can't get seems better than _____we have.
A.What,what B.What,that C.That;that D.That;what
11.___might be expected,the response to the question was very mixed.
A.As B.That C.It D.What
12.I shall never forget those days_____I lived in the army with the soldiers,_____has a great effect on my life.
A.that;which B.When;which C.when;that D.which;that

1.这个著名歌手一次演出获得1000美元
appearance指的是演出,A.C项均为动词,D项词义不合语境
2.你的意思是我对你很严厉.是的,如果我不得不回答的话（意译,确实如此）
由语境可得答案
3.poetry可数,排除D.C.Lots of lines
4.题错了吧,不unknock,是unlock.他把钥匙向右转,打开了门.by表示通过...途径,to是向某个方向的意思
5.高速公路会关闭,直到接到进一步的通知
四个词的意思只有notice有通知的意思
6.A总之,总而言之,B therefor因此,C除此之外,另一方面 D然而
显然只有C符合题意
7.A项是因为的意思,如果用during,应是during the time when Father was away in France .BD讲不通
8.句子缺主语,用What,如果用That,应该是The thing that is done cannot be undone,Where显然与语境不符
9.空格后面是完整的一句话,又是在动词后面,应该用that引导宾语从句
10.we can't get这个从句缺宾语,应用What,其引导的宾语从句做整个句子的主语.同样,后面的What引导的宾语从句做整个句子的宾语.
11.后面的是一个完整的句子,并且逗号前后的两个句子没有连接词,那么前面的应该是一个状语从句,不是一个完整的句子.只有A符合
12.When引导的后置定语先行词是those days.which引导的非限制性定语从句先行词也是those days
要注意分析句子成分!