It is thought that one billion people I the world,  ______is half the word’s workers, earn their living by farming.

A. if    B. that    C. which   D. what

—The experiment is of particular importance.

　　　　—I see. We will carry on with it ________ we can get enough money.

　　A. unless　　　　B. though　　　　C. whether　　　　D. until

I understand ______ preparation that staff must put in under pressure to meet the deadline.

1. A.
   more than the enormous amount of
2. B.
   better than most the enormous number of
3. C.
   better than most the enormous amount of
4. D.
   fewer than the number of

I began to fish before memory began, _______ I know I have always fished.

 A. so far  B. so as far as  C. as far as  D. so

I should like to try that coat on, but I don t know if it is my ____.

A. length   B. measure C.size  D. pattern