... 31. What percent of the earth’s area do rain forests cover? A. Only 6 percent B. 20 percent C. less than 6 percent D. over 6 percent 32.How many known kinds of plants and animals call the rain ... will make B. was making C. has made D. would be making 16. On behalf of the referees and athletes, referee Hoang Quoc Vinh and shooter Nguyen Manh Tuong swore to an oath of "_______, Honesty ... knows that a good education can improve her life. A. therefore B. because of C. because D. so 26. Joe seemed to be in a good mood, ____________ he snapped at me angrily when I asked him to join...