51. Age-> old
52. To play-> playing
53. ........does a banana cost
54. In one day-> one day
55. Marble-> marbles
56. As-> such as
57. Scientific-> science
58. Coming-> to come
59. less-> fewer
60. Bỏ many.
V
1. B. at bỏ
2. D. to play playing
3. D. cost costs
4. D. in one day one day
5. B. marble marbles
6. B. as like
7. D. scientific science
8. A. coming to come
9. A. less fewer
10. C. many bỏ
Cảm ơn bạn nhiều vì đã giúp mình cảm ơn......