Bài Làm:
| 1 | D | 21 | C |
| 2 | B | 22 | C |
| 3 | C | 23 | D |
| 4 | D | 24 | C |
| 5 | C | 25 | A |
| 6 | D | 26 | D |
| 7 | D | 27 | C |
| 8 | C | 28 | A |
| 9 | C | 29 | D |
| 10 | A | 30 | D |
| 11 | B | 31 | C |
| 12 | D | 32 | B |
| 13 | A | 33 | C |
| 14 | C | 34 | B |
| 15 | B | 35 | B |
| 16 | A | 36 | B |
| 17 | C | 37 | D |
| 18 | B | 38 | D |
| 19 | A | 39 | D |
| 20 | B | 40 | A |