suggest, want 和consider后面加什么？下面三题该选什么？为什么？

7. They're considering___before the prices go up.
A. of buying the house
B. buying the house
C. with buying the house
D. to buy the house

9. Peter suggested ___ at the next town.
A. to stop B. stopping C. stop D. having stopped

10. Your hair wants ___ . You'd better have it done tomorrow.
A. cut B. to cut C. cutting D. being cut

你好！
7、选B。他们正在考虑价格上涨前买下房子。
理由如下： 正常情况下没有Consider to do,只有在被动时才有
consider to do是认为的意思.
例:China is considered to be one of the greatest country in the world.中国被认为是世界上最伟大的国家之一.
consider doing 是考虑的意思.
例I am considering going or not.我正在考虑去不去.
8、选C。PETER建议在下个村镇停下来。
理由如下：,suggest that从句用should+动词原形,that和should可以省略.
9、选C。你的头发需要剪了，你最好明天就去剪发。
理由如下：want (of) doing需要（被）

dca

bca
第一个是consider+doing sth.表示考虑做某事~~
第二个是suggest+动词原型，这里是一种虚拟语气用法
第三个是want +done，省略（to be)~~由被动的意思

7.选B
解析如下：consider作动词时主要有以下四种用法:

一、作"思考"、"考虑"(=think about)解,后面可接动名词、由"how, what等+动词不定式"或者从句作宾语.但要特别注意,consider后面不能直接跟动词不定式作宾语。例如:

①We are considering going to Hainan for the Spring Festival.我们在考虑赴海南过春节。

②He has never considered how to solve the problem. 他从未考虑过如何解决那个问题。

③Do you consider that we can finish the project ahead of time?你认为我们能提前完成这个项目吗?