Sắp xếp theo thứ tự
A. Mum: OK, but you shouldn't run down the stairs.
B. Mum: Hey, Mike. Don't take your baby sister out on the balcony.
C. Mike: OK, Mum, I won't do that again.
What about walking her in the garden?
D. Mum: Because she may fall down.
E. Mike: Why shouldn't I take her there?
F. Mike: OK, Mum.