12 chac chan

Chiều rộng hình chữ nhật là : 85,5*5/9=47,5 (cm)

Diện tích hình chữ nhật là : 4061,25 (\(cm^2\))

1 B

2B

3C

4A

5B

6B

7B

8A

9B

10C

11B

12C

0 He asked me if I could give him my book

1Nam said to Lam that he should study harder

3Nga said that she would visit H.A with her father the following week.