Answers to Cilt 1

page 67 - present and future verbs
1. A and D are correct.
2. A --> R, B --> W
3. A
4. A
5. A
6. A
7. C
8. A is wrong, B is wrong, C is wrong.
9. A is right, B is right.
10. A is right.
11. A is right, B is wrong.
12. C
13. A and B are right.

page 68 - past and perfect verbs
1. A and B are right.
2. A is wrong, B is right, C is right.
3. A is wrong, B is right, C is wrong.
4. A and C are right.
5. C is right.
6. A is wrong, B is right.
7. B, C, D, E and F are right.
8. Both are right.
9. Yesterday's maths exam was very hard, but I think we studied enough to pass it.
10. A is right, B is wrong, C is right.
11. A and C are correct.
12. C is correct.
13. C is correct.
14. Both are right.
15. Only B is right.
16. C and D are right.
17. A, B, E and F are right.
18. Both are right.

page 71 - auxiliary verbs
1. Both are right.
2. B
3. A and D are right.
4. A and C
5. A
6. All are right.

page 131
1. A is right, B is wrong, C is right.
2. A is right, B is right, C is right.
3. A is right, B is right, C is right, D is right.
4. B is in present simple continuous.
5. C
6. C
7. A
8. A and C are right.
9. It is normal. It is typical of very formal language. It is less common in AmE than in BrE. It is not a mistake.
10. It is normal. It is correct but unusual.
11. B

page 132 - past and perfect verbs
1. A and C are right.
2. B
3. A and C are wrong, B is right.
4. A and C are wrong, B is right.
5. Different tenses are used.
6. No
7. C is right, A and B are wrong.
8. A
9. A is right, B is right.
10. B is more natural.
11. C
12. already, before, just, today, yet
13. A, B and D are right.
14. A, B, D and E are right.
15. Because the sentence describes a past action whereas the incorrect one implies that the thinking is on process.
16. A implies a continuing action.
17. A
18. A implies a past action that had taken place before the main action. B implies that the two actions are simultaneous.

page 135 - auxiliary verbs
1. A and D are right, B and C are wrong.
2. All are right.
3. A is right, the others are wrong.
4. A is more natural.
5. B
6. B
7. A: happen, B: come, C: dripping