gwd24-20, gwd24-21

taratara

24-20 According to a 1996 survey by the National Association of College an University Business Officers, more than three times as many independent institutions of higher education charge tuition and fees of under $8,000 a year than those that charge over $16,000.

A) than those that charge

B) than are charging

C) than to charge

D) as charge

E) as those charging

24-21 Nobody knows exactly how many languages there are in the world, partly because of the difficulty (of? ) distinguishing between a language and the sub-languages or dialects within it, but those who have tried to count typically have found about five thousand.

A) and the sub-languages or dialects within it, but those who have tried to count typically have found

B) and the sub-languages or dialects within them, with those who have tried counting typically finding

C) and the sub-languages or dialects within it, but those who have tried counting it typically find

D) or the sub-languages or dialects within them, but those who tried to count them typically found

E) or the sub-languages or dialects within them, with those who have tried to count typically finding

            

20的答案是e，为什么不选d？charge这里是什么成分？

21的答案是a，哪位nn帮助分析一下这里it指什么？为什么要用have tried?

谢谢先。

p200002

20.前面是independent institutions of higher education,当然后面也需要有对称的,所以E是对的.CHARGE的意思就是CHARGE在字典里面的意思.
21.IT指有含有SUB-LANGUAGE OR DIALECT的LANGUAGE;用了HAVE FOUND,当然只能用HAVE TRIED喽.