=>
D/
1. If the thief hadn't left his gloves at the scene, he wouldn't have been arrested.
2. If you don't stop talking, you won't understand the lesson.
3. If I had enough money, I would buy the car.
4. If you don't water these plants, they will die.
5. If we had had a map, we wouldn't have got lost.

V/
51. A -> faster
D -> well
52. A -> What
53. B -> farther
54. B -> couldn't do
55. A -> more
56. C -> as
57. D -> anybody
58. B -> gracefully
59. A -> go

1, He was arrested that the thief left his gloves at the scene.

2, If you don't stop talking, you won't understand the lesson.

3, The car is too expensive for me to buy.

4, If there isn't water, the plant will die.

5, We didn't have a map so we got lost.

___

51, A

52, D

53, B

54, B

55, A

56, C

57, D

58, B

59, A