1 B

2 B

3 C

4 A

5 C

II

6 C

7 D

8 C

9 B

10 A

1B

2B

3C

4A

5C

6C

7D

8C

9B

10A

`#Bao`

`a)40%xx200=80`

`b)10%xx25,5=2,55`

`c)-50xx3,5%=-1,75`

10,

a,40% của 200 là

200.40%=80

b,10% của 25,5 là

25,5.10%=2,55

c,3,5% của -50 là

-50.3,5%=-1,75

a,80 b,2,55 c,1,75

ok

quá khứ đơn ấy mà

1 My sister has learned English for 5 years

2 A supermarket was built near the airport last year

3 I spent three hours cleaning the house yesterday

6 The wall built three weeks ago fell down

7 Unless you leave me alone, I will call the police

8 The suspects are being followed by the police 

10 Nobody in this team is as good at playing football as Tom