10.Traditionally, Chinese are written _______ in columns going from top to bottom and ordered from right to wrong.

42. The passage mentions that the grade F was once banned at ______

20. I hope all the precautions against air pollution, ______ suggested by the local government, will be seriously considered here.

5. Mainstream pro-market economists all agree that competition is an ______ spur to efficiency and innovation.

1. Now may farmers have reverted to traditional farming methods, ________ their ancestors’ way to handle specific pest or disease problems.

55. Which of the following statements about “deserts” is NOT true?

26.

27.

36.

38.

48. The moon-landing is mentioned in the first paragraph to illustrate ________.

18.He has made another wonderful discovery, ______ of great importance to science.