错四个，看文青这语法大拿能全对不？！有三个还是不明白，大家帮我看看 :)

9. Many people agree that ___ knowledge of English is a must in ____ international trade today.

　　A. a, 不填    B. the, an    C. the, the      D. 不填，the     

For me there is no correct answer. I was hoping to see "the, 不填", unfortunately......why????

17. Most of the representatives think that ______ the meeting was very successful.

　　A. on whole of   B. on a whole   C. on the whole   D. on the whole that 

I chose "C", but the answer is "D". Do we really have to put another "that" there?

20. “How did you pay the workers?”

　　“As a rule, they are paid ______.”

　　A. by an your    B. by the hour     C. by a hour    D. by hours  

Normally we say like this: "How do you get paid?" "I get paid hourly. :(

当年托福把语法改成口语（录音）后，我激动的呀～～口语部分几乎拿了满分，如果是语法就肯定不行了，我语法很烂的！因为语法差，所以写东西只能靠语感，平时听人怎么说，大概就怎么写，所以写出来的东西很多人都说犯的错误不像在国内学习过英语的人犯的错误。所以我相信drunker是在这里长大的孩子 :)