III

1.T

2.T

3.T

4.F

5.T

IV

1.B

2.A

3.B

4.C

5.D

E

I

1 i have bought a laptop but I haven't used it

2 I have written a blog but I haven't uploaded any photo to it

3 we have started the game half an hour ago but we haven't finished it

4 My dad has been to London but he hasn't seen Big Ben

5 I have read my English book but I haven't done my English homework

6 they have have lunch but they haven't have dinner

7 I have downloaded some songs but I haven't listened to them

E.x III:
1. T
2. T
3. T
4. F
5. T
E.x IV:
1. B
2. A
3. B
4. C
5. D
P.E:
E.x I:
1. I have bought a laptop but I haven't used it.
2. I have written a blog but I haven't uploaded any photo to it.
3. We have started the game half an hour ago but we haven't finished it.
4. My dad has been to London but he hasn't seen Big Ben.
5. I have read my English book but I haven't done my English homework.
6. They have lunch but they haven't had dinner.
7. I have downloaded some songs but I haven't listened to them.

Hc tốt!!!!