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 Having withdrawn from the race, the candidate decided supporting his opponent despite the opponent's representing the other political party.

 The answer is B, the word "Decided" must be followed by the infinitive (to support)

11. The soldiers were unable to determine where ____.

a. the jeep had been left

b. had been leave the jeep

c. had the jeep been left

d. had the jeep left

Explanation : The answer is A, because after the question word in an embedded question, it must be subject + verb.

12. The manager was angry because somebody _____.

a. had allowed the photographers to enter the building

b. had let the photographers to enter into the building

c. permitting the photographers enter the building

d. the photographer let into the building without the proper documentations

Explanation : The answer is A, because it use The past perfect tense, it indicates that an action was completed (finished or "perfected") at some point in the past before something else happened. And After the subject of the second clause, somebody, must appear the verb, not another noun phrase. Also, documentation is a non-count noun and is not made plural.

13. The committee members resented ____ of the meeting.

a. the president that he did not tell them

b. the president not to inform them

c. the president’s not informing them

d. that the president had failed informing themselves

The answer is C, because the word "Resent" is a transitive verb, it followed by a verb noun. In this sentence, there is an additional logical subject before the gerund, so you must add ('s) after the logical subject to form the correct grammatical form. And  After the verb resented there must be a noun phrase or a clause. It would also have been correct to say “resented the president for not informing them of the meeting.

14. _____ did Arthur realize that there was danger.

a. upon entering the store

b. when he entered the store

c. after he had entered the store

d. only after entering the store

The answer is D, this sentence involves the use of an adverbial at the beginning of the sentence. Correct form is adverbial + auxiliary + subject + verb. The auxiliary did is in the main sentence before the subject Arthur. After a limiting word (only) introduces a sentence, the order of the subject and verb is altered. That is why this sentence has the auxiliary did. A whould have been correct if the order hadn’t been reversed: Upon entering the store, Arthur realized that there was danger.