11．frown on sth替换 be against , disagree with sth.
　　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 records are less impressive.

　　12．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.

　　13． a slice of, quiet a few , several替换some.

　　14．harbor the idea that, take the attitude that,hold the view that, it is widely shared that,it is universally acknowledged that)替think（因为是书面语，所以要加that）.

　　15．affair ,business ,matter 替换thing.

　　16．to name only a few, as an example替换 for example, for instance.

　　17．next to / virtually impossible,替换nearly / almost impossible.

　　18．give rise to, lead to, result in, trigger 替换cause.

　　19．exceedingly,extremely, intensely 替换very.

　　20．be indicative of ,be suggestive of ,be fearful of代 indicate, suggest ,fear.