几道高中英语选择题....迷惑.....

来源：百度知道 编辑：UC知道 时间：2024/05/13 14:01:53
1,Being fit helps you to stay alert and ____on your lessons
A focus
B focused
Cto focus
D focusing
the answer is B,could you please explain it for me?
2,The Shen Yang Expo contains a large collection of living examples of plants____in the local and various other areas.
A which grow
Bthat growing
Cthey grow
D which are grown
choose A,but why not D?
3The factory is now facing great difficulties._____manpower is the chief cause.
A short of
B shortage of
choose B,why not A?
4,The school is quite ____teachers,so it has to engage teachers here and there.
A short of
b lack of
choose A,why not C.我是彻底不懂！！！
是B啊，为什么不是B？LACK OF ，SHORT OF什么区别？？？？

一. B 此处和alert共用一个stay,而stay+adj/分词表示"保持一种...状态"
二. A grow Vt. 种植,培育(=plant),有被动语态
grow还可以做Vi 生长,此时无被动语态
如果选D表种植,就应该用过去时,因为它已经拿到展销会来了,种植/培育动作早就完成了.
三. B short adj 它不能单独做主语啊,要用就该用Being short of
而shortage才是名词,可做句子主语
四. 我来解释一下lack of和short of的区别
1. short adj be short of... 缺少...
2. lack
1) n. (a) lack of... 缺少... for lack of... 因为缺少...
2)Vt. lack sth/sb 缺少...
3)Vi lack for sth 缺少...,但是只用于否定句
另外: lacking adj. be lacking in... 缺少...
3. 所以第4题只能选择A.
原因:lack(n.) of...用在例句
The school is quite lack(adj?/n!) of teachers肯定不通顺
可以这么造句,比如: Despit (a) lack of confidence, he still made an attempt.

stay focused 保持精神集中
stay 加过去分词，表示保持某种状态
stay frozen, stay confused

D. which grow 植物可以自己生长
不过D也讲得通， 表示人工栽养的

B. shortage of
shortage是名词，short是形容词， 前面要有助动词

A。 short of
你没有给C

stay focused 和 be focused 差不多
但是我觉得AC也没什么错,但