1.individuals,characters, folks替换(people ,persons)

2: positive, favorable, rosy (美好的)，promising(有希望的)，perfect, pleasurable , excellent, outstanding, superior替换good

3:dreadful, unfavorable, poor, adverse, ill (有害的)替换bad如果bad做表语，可以有be less impressive替换

eg.An army of college students indulge themselves in playing games, enjoying romance with girls/boys or killing time passively in their dorms. When it approaches to graduation ,as a result, they find their academic records are less impressive.

4.(an army of, an ocean of, a sea of, a multitude of ,a host of, many, if not most)替换many.

注：用many, if not most 一定要小心，many后一定要有词。

Eg. Many individuals, if not most, harbor the idea that….同理 用most, if not all ,替换most.

5: a slice of, quiet a few , several替换some