这些答案为什么是括号里的。为什么不能选用后面问号的代替？
1.He is a friend of (kate's father's) kate father's? father's of kate ?

2.the rich (are) not always happy. is?

3.he,including his parents ,(likes ) this novel. like? are like ?

4.this bridge is (ten meters)long. 为什么是单数后面用这样的？

5.let's have a (ten minutes)break.

6.you should take more (exercise),don't always sit at the desk busy doing your (exercises) 我本来作的是两个答案反了

7.(A glass) is made of (glass), 我本来填的是 glass , the glass

8.this is an old photo of my mother's when she had (short hair),and now she has (grey hairs). grey hair?

9.this is the dirst time in our (lives)that we have come to beijing . life ? live?

10.it is widely accepted that young babies learn to do things because certain acts lead to (rewards) result?

11.these books,which you can get at any bookshops,will give you (all the information)you need. all for the information?

12.i agree with most of what you said ,but i don't agree with (everything) something?

13.the engine in your jeep works for better than (that of his). his?

14.(the boys each have ) a new model plane each of the boy has?

15.----whoever leave the room last ought to lockthe door

----will he come tomorrow?

----we believe (so) it?

16.he must have thrown away (hers) by mistake. her?

1.He is a friend of (kate's father's) kate father's? father's of kate ?
这是所有格形式，问好的两个答案格式错误，

2.the rich (are) not always happy. is?
这里the rich 代表的是一个群体，富人群体，这个语法是形容词做名词用，你在语法书里查一下，通常这种情况下，形容词代表的是一个复数群体。

3.he,including his parents ,(likes ) this novel. like? are like ?
这是主谓一致问题，这里的主语是he.
4.this bridge is (ten meters)long. 为什么是单数后面用这样的？

ten meters 是这句话里的标语，不存在和bridge的主谓一致问题，is是为了与bridge 保持一致的。你要留心句子的结构。
5.let's have a (ten minutes)break.
ten minutes 是一个词组，常见的还有很多
6.you should take more (exercise),don't always sit at the desk busy doing your (exercises) 我本来作的是两个答案反了

第一个exercise 表示活动，运动，常用take exercise这个短语，后一个exercises标示的是练习，这里大概指作业什么的。意思不一样。
7.(A glass) is made of (glass), 我本来填的是 glass , the glass
第一个是表示眼镜，要用a，也可以用a piece of glass，第二个是标示玻璃，不用特指，不加ｔｈｅ。
8.this is an old photo of my mother's when she had (short hair),and now she has (grey hairs). grey hair?
第一个short hair表示整体，头发整体短发，第二个grey hairs表示有一些花白头发，是个体，所以用复数。就好像fish 如果表示鱼的整体概念就用单数，但如果表示很多种各式各样的鱼就用fishes。
9.this is the dirst time in our (lives)that we have come to beijing . life ? live?
our已经说明是复数形式，所以用life的复数形式lives。

10.it is widely accepted that young babies learn to do things because certain acts lead to (rewards) result?
这句话的意思你可能没看懂，大概是说婴儿的学习动机来自他学习后可以得到的奖励的激励因素。
11.these books,which you can get at any bookshops,will give you (all the information)you need. all for the information?
all the information整体做名词。问好那个格式完全不对。
12.i agree with most of what you said ,but i don't agree with (everything) something?
something 不可以用在疑问和否定句里。
13.the engine in your jeep works for better than (that of his). his?
整句的主语是the engine，所以对比后的表语应该也是物品.如果用His会指代不明，且语法上缺少宾语that。
14.(the boys each have ) a new model plane each of the boy has?
答案如果是each of the boys 就对了，你问好后的BOY 没有事复数格式。
15.----whoever leave the room last ought to lockthe door

----will he come tomorrow?

----we believe (so) it?
这题你好像没写全，

16.he must have thrown away (hers) by mistake. her?
这里Hers表示一个物品，是她的所属物。her表示的是她本人，意思不对。