英语比较差,求告诉这些英语错在哪,怎么修改.好让我自己订正

也太多了点吧!
1。Either parents nor teachers believe that children should be given too much homework。
Either改为Neither,neither。。。nor。。。既不。也不。。。
2。I was watching an exciting TV play until the screen went blank。
until改为when,并列连词表示“就这这时”
3。What did you last night when the fire was breaking out?
改为What were you doing。。。原题漏打了do。
4。We want you to be not only a useful member of society,but also to be a responsible one。
去掉but also后的to be,not only。。。but also。。。对等并列。
5。They just dashed out of the house when it collapsed。
when改为before。
6。What we should do now is not to increase production,but improving the quality of our product。
but后improving改为to improve,not。but。不是。而是。,也是对等并列。
7。Either the boy's parents nor his brothers are to stay at his bedside during the night。
改为Either。。。or。。。或Neither。。。nor。。。,都能说得通,道理同第一题。
8。It might be days when the patient can stand on his own feet。
when改为before,意为：也许过几天病人才能站起来。
9。Where have you been?I've looked for you the whole morning。
后面改为I've been looking for。
10。In the 21st century,a computer will play a more and more important role in our everyday life。
a改为the,并非特指一台电脑,the加单数名词表示某一类属。
11。Something which a witness said during the trial has been bothering me。
which改为that,先行词为指事物的不定代词关系代词用that。
12。Many parents mistakenly believe that the more toys children have,they will be more creative。
可以说没问题,但出题人肯定想让你把they will be more creative改为the more creative they will be。
13。A house without a book is as a room without a window。
as改为like。
14。He was very glad to see his old friend that tears ran down his cheeks。
very改为搜,so。。。that。
15。People believe that tomorrow's car will be bigger,faster,and more comfortable as before。
as改为than。
16。Both on land and sea,helicopters have rescued many people。
and后加on,both。。。and。。。对等并列。
17。Jim is intelligent,but not as hard-working like his sister。
like改为as,not as。。。as。
18。The most humorous person whom I've ever met is my teacher of Chinese。
可以不改,但出题人想让你把whom改为that,先行词被最高级修饰通常用that,但那指的主要是事物。
19。I don't believe an old man of 80 could be so strong to knock down a door。
so strong后加as,so。。。as to。。。如此。。。以至于。
20。All those that the people want are lasting peace and social progress。
删除those,先行词是不定代词all。