Answer of toefl part 1

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 I choose C, because this sentence need subject and verb 8. The professor decided to allow the student to take the examination a second time because the low scores. I choose because ,Because is not right and we should put "because of" 9. If the driver’s own car __________ damaged, the favorite probably would have won the race. A. had not been B. not C. no had been D. has no be I choose A, because it's form of conditional sentence type 3. 10. Having withdraw from the race, the candidate decided supporting his opponent despite the opponent's representing the other political party. I choose despite , because despite is not right answer and should put the conjuction "because" to right answer. 11. The soldiers were unable to determine where __________. ...