Here are the correct answers for each question:

6. Mary is one of the girls who **are** often late for school. A. is B. **are**
7. Two hours **is** not long enough for this rest. A. have B. **is**
8. Ninety percent of the work **has** been done. A. **is** B. are
9. Those who **want** to go with me, please raise your hand. A. **want** B. wants
10. Salt and water **are used** to wash the wound. A. is used B. **are used** C. was used D. were used
11. The news **was** bad last night. A. were B. **was**
12. Three-fifths of the police **have been trained** in the school near the town. A. has trained B. have trained C. has been trained D. **have been trained**
13. Are not only you but also he going to Japan? A. **Are** B. Is C. Were D. Was
14. All the books on the shelf **belong** to me. A. **belong** B. belongs C. belonging D. is belonging
15. The trousers you bought for me **don't fit** me. A. **don't fit** B. doesn't fit C. fits D. fit not
16. Mumps **is** usually caught by children. A. are B. was C. **is**
17. The United States **lies** between Canada and Mexico. A. lying B. **lies** C. lain D. lie
18. Physics **helps** us understand the natural laws. A. **helps** B. help C. have helped D. helped
19. The police **have arrested** the robber. A. were arrested B. has arrested C. **have arrested** D. was arresting
20. The cattle **are grazing** in the field. A. is grazing B. grazes C. has grazed D. **are grazing**
21. Either you or he **is** wrong. A. are B. was C. have been D. **is**
22. John as well as Mary **is** very kind. A. were B. **is** C. are D. have been
23. The doctor with the nurses **is** exhausted after the operation. A. were B. is C. have been D. are being
24. Five miles **is** not very far. A. **is** B. are C. have been D. were
25. Are ten years too long? A. Are B. **Is** C. Are being D. were
26. Neither his parents nor his teacher **is** satisfied with his result. A. are being B. were C. **is** D. have been
27. Each boy and each girl **has** a book. A. are having B. have C. **has** D. have had
28. Writing a lot of letters **makes** her tired. A. make B. **makes** C. have made D. are making
29. Is everybody ready to start now? A. Are being B. **Is** C. Are D. Is being
30. None of the butter in the fridge **is** good. A. is being B. **is** C. are D. are being
31. None of the students **have finished** the test yet. A. **have finished** B. has finished C. are being D. is finishing
32. A pair of shoes **is** under the bed. A. have been B. are C. **is** D. is being
33. 200 tons of water **was used** last month. A. **was used** B. had been used C. were used D. is used
34. In the hotel, the bread and butter **is served** for breakfast. A. **is served** B. are served C. serves D. serve
35. The Browns were nice to me when I was in England. A. The Brown's B. Brown's C. **The Browns** D. Browns