1. OUr teacher wants our lessons to be prepared carefully.
2. Dane congratulated me on winning the championship.
3. THe father has not ridden to work for 2 weeks.
4. If that meadow was large, farmers wouldn't raise cattle and sheep there.
5. Because of not having enough money, she didn't buy the shirt.

seventeen -> seventeenth

29. C

30. C

MC: `15(x+2)`

`1/(5x+10)=1/(5(x+2))=(3)/(15(x+2))`

`x/(3x^2+6x)=x/(3x(x+2))=1/(3(x+2))=5/(15(x+2))`

a) `(x^3-x^2)/(x^3-2x^2+x)`

`=(x^2(x-1))/(x(x-1)(x-1))`

`=x/(x-1)`

`=>` 2 phân thức bằng nhau.

b) `(x^2+2x+1)/(2x^2-2)`

`=((x+1)(x+1))/(2(x+1)(x-1))`

`=(x+1)/(2(x-1))`

`=(x+1)/(2x-2)`

`=>` 2 phân thức bằng nhau

1. His father wishes Tom had been interested in Mathematics.

2. I wish I hadn't been absent from class yesterday.

3. I wish I hadn't missed an exciting football match on TV last night.

4. He wishes she kept silent in the hospital.

5. I wish I hadn't spoken to him so severely yesterday.

5. She wishes she had more money.

Had he had breakfast, he wouldn't be hungry now.

concentration

1. began
2. lost
3. visited
4. were
5. Did you spend
6. cleaned
7. started
8. went
9. spent
10. was
11. died
12. worked
13. did
14. wrote
15. bought
16. read
17. listened
18. watched
19. went
20. was
21. went
22. had
23. met
24. was
25. did you do
26. studied
27. didn't visit
28. was
29. built
30. didn't