31. We haven't seen each other from we left school. A B C D 32. Although Nam worked very hard, but he didn't pass the final exam. A D B C 33. Dinosaurs became extinct millions of years ago because of the earth's climate changed drastically. A B C D 34. Although taking a taxi, Bill arrived late for the concert. A B C D 35.5. She worked too hard that she became ill. A B C D
