各位能否帮我看看为什么这么填,其他选项为什么错.万分感激!

各位能否帮我看看为什么这么填,其他选项为什么错.万分感激!
顺便帮我总结一下这些题所涉及考点知识.
1.The editorial (being written) now will appear in tomorrow's newapaper.
a.writing b.to write c.being written d.write
2.please call again.Jim (is having) a bath just now.
a.had b.having c.is having d.has
3.On no condition (would we agree) with him
a.we cannot b.would we agree c.can we agree d.we can agree
4.Once environmental damage (is done) ,it takes many years for the system to recover.
a.has done b.it to do c.does d.is done
5.(What) we are doing has never been done before.
a.That b.what c.which d.whether
6.There is more land in Australia than the government knows (what to do with ).
a.what to do with b.to do with it c.how to do d.to do it
7.The hours (that) the children spend in their one-way relationship
with television people undoubtedly affect their relationships with real-life people.
a.that b.when c.in which d.on which
8.I do wish you could (paste) these sheets of paper together.
a.mend b.repair c.paste d.patch
9.A cool rain was falling,(mixed) with snow.
a.mixed b.mixing c.to mix
10.When suddenly transplanted in a new land,quite a lot of people find (it difficult) to adjust to the way of life there.
a.difficult b.difficulty c.the difficulty d.it difficult
11.when he visited the house 50 years later,he found everthing was (as) it had been before.
a.that b.which c.same d.as
12.drunkenness was as much of an (obstacle) to enlightenment as lack of education.
13.if you listen to me,you (shall) have some candies,dear.
a.shall b.may c.will d.must
14.-I always look out when crossing the street.
-You're right.You cannot be too (careful)
a.careful b.hurried c.careless
15.Is it in that factory (that) this type of cars are produced?
a.typing b.to be typed c.typed d.to type
16.(founded) in 1636,Harvard is one of the most famous universities in the United States.
A.founding b.It was founded c.that d.what
17.Fortunately we had a map,without (which) we would have got lost.
a.which b.it c.that d.what
18.when I said some students are lazy.I (wasn't referring) to you.
a.don't refer b.wasn't referring c.hasn't referred d.didn't refer
19.(To make) bricks,workers press clay into blocks and bake them to the requisite hard.
a.being made b.the makeing of c.to make d.made

1和2类型基本相同,都是现在进行时,只不过1是被动,2是主动.
3是前否定假设,所以倒装并且是虚拟语气所以用would we agree.
4同样是被动
5.(What) we are doing 是主语,what这个主语从句中的doing的宾语.
6中用(what to do with ).因为land是with的宾语,介宾
7.主语从句中that指代the hour,后面的the children spend in their one-way relationship with television people 是对the hour的修饰
8.看到these sheets of paper together.有“纸”、有“一起”,当然是粘贴了,那就paste,纸不能修理、修复、补
9.过去式表示一种状态
10.it代指前面一句When suddenly transplanted in a new land
11.as像什么一样.本句中指50年后还像以前一样.
12.大意是：酗酒是一个障碍如同启蒙缺乏教育一样.我翻译的可能不准
13.shall表虚拟语气,因前面是if
14.You cannot be too (careful)表示怎么小心都不为过
15.答案你给的和题目对不上,你是问that吧,这是宾语从句that代指后面的type of cars are produced
16.主语后置,(founded) in 1636做状语修饰Harvard
17.which在后面的从句中作without的宾语,代指map
18.过去进行时,当我说某些很懒惰的时候,我那个时候并不是指你
19.to表示目的,为了...