1. What's your sister weight?

2. My mother didn't write a sick note for me.

3.When did the students have a medical check?

4. Yesterday I was late for school because I got up late.

hay đấy bạn trong doremon phải không?

(x;y)\(\in\){(1;1);(0;2);(2;0);(-1;-1);(0;-2);(-2;0)}