Sentecne questions Thank you.

Hello,

I don’t know whether these sentences conform to 

the usage of English.  If you find something wrong 

in Grammar and semantics, help me correct them. 

Thank you for your help.

1. To help its students look for a job, the writer suggests that A college should duplicate/ imitate the experience of B College to provide more course in business and computer technology.

I am not sure which word'' duplicate or imitate'' works in the above sentence. Or is there a more suitable  vocabulary to describe?

2. There are so many different factors—majors, core curriculum, the number of faculty, students’ motivation, and the source of funds—between A College and B College, so that the writer can’t compare them; otherwise, he might make a specious analogy.

3. The arguer cites a survey to show that over 80percent of the respondents desire to reduce the consumption of fast food. However, this survey doesn’t mention the proportion of non-respondents. Given that the ration of respondents to non respondents is one to ten, the result of this survey will be questionable.   

Hello Clive

Since the survey just mentions the section of responents, I try to question its validity. 

Can you help me check these sentences whether they are awkward? If they are, help me revise them. Thank you very much.

1.The survey does not mention the proportion of non-respondents. The problem is that if the ration of respondents and non-respondents is one to ten, the survey of the result is questionable because its sample size can not be diverse and representative enough.

2. Given that the questionnaire’s questions just provides three choices: most satisfaction, more satisfaction, and satisfaction, the result of this study will be that most people are satisfied.

The other questiona is that when I writer repetition about'' if.'' I mean that

If......, if....... ,if......, main clause  

If.....; if........; if......., main clause

Which one is correct?

If you find something wrong in Grammar or vocabulary, help me check them. Thank you again.

If A does not help inhabitants collect old furniture, if A's workers require inhabitants to put their garbage on specific areas and it might take them more than twenty minutes to dump their garbage,  the town had better not employ A to collect its garbage. 

Hello Clive

Do I have to use a conjunction in this kind of sentence?

If the results of research might endanger the vast majority of the world population, if the results of research seem to threaten world peace, if the results of research might violate professional ethics, they are not a worthwhile investment.

If the results of research might endanger the vast majority of the world population, if the results of research seem to threaten world peace, or if the results of research might violate professional ethics, they are not a worthwhile investment.