Toefl Exercise_2
7. It is not clear when____, although there are many different theories. a. dinosaurs becoming extinct b. dinosaurs extinction c. dinosaurs became extinct d. did dinosaurs become extinct The answer is C, This is an embedded question, and thus the order is subject + verb, with no auxiliary. 8. The professor decide to allow to students to take the examination a second time because the low scores. The answer is D, the word "because" it must use "because of". And "Because of" is noun (phrase), so we must using because of + noun (phrase) 9. If the driver's own car _____ damage, the favorite probably would have won the race. a. had not been b. not c. no had been d. has no been The answer is A, because it has a Conditional sentences/if clauses, and must Use the past perfect construction in past condition. 10. Having withdrawn from the race, the candidate decided supporting his opponent de...