V. Write the questions with "Did.....?" and give the answer with "Yes/No:

6. the teacher gave her students a lot of homework

.................................................................................

7. His uncle took him to see Cham Temple

.........................................................................

8. Liz bought a lot of souvenirs

...................................................................

9. they put the fish in a big bag

............................................................

10. Ba wore the cap with a dolphin on it

........................................................

V. Write the questions with "Did.....?" and give the answer with "Yes/No:

They played soccer yesterday afternoon

- Did they play soccer yesterday afternoon?

- Yes, they did./ No, they didn't

1. He sent a letter to his penpal last week

.........................................................................

2. She taught us English last year

...........................................................................

3. They did their homework carefully

.....................................................................

4. the Robinsons bought a lot of of souvenirs

......................................................................

5. Tourist ate seafood at that famous restaurant

.....................................................................

Chứng minh rằng các phân số sau đây tối giản với n thuộc Z

i, 12n + 1/ 30n +2

k, n^3 + 2n/ n^4 + 3n^2 - 1

Chứng minh rằng các phân số sau đây tối giản với n thuộc Z

e, 14n + 3/ 21n + 4

f, 2n + 3/ 4n +8

g, 3n + 2/ 5n + 3

h, n/ n + 1