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 Explain : Answer is C, because it is use simple past tense. 8. The professor decide to allow to students to take the examination a second time because the low scores. Explain : Answer is D, the word "because" it must use "because of". And"Becauseof" is a preposition. 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 Explain : Answer is A, because it has a Conditional sentences/if clauses. The past perfect is used in conditional sentences. Main clause: would + have + past participle. 10. Having withdrawn from the race, the candidate decided supporting his opponent despite the opponent's representing the other political party. Explain : Answe...