Đề bài: Read Ba's problem and give him a health tip, using imperative with" more/less" 

He is obese. He loves eating junk food and never does any exercise                =>1. He should do more exercises

2. He should eat more vegetable instead of junk food

3. If he eat junk food , he 'll have many diseases        

1. mặt trăng

2. trái đất

3. cánh.... 

Cần giải thích ko

12 + 13 : severely