2.Babara used to stay with an Italian faminly
3.I didn't use to drinking coffee when i was younger
4.We used to have lost interest in our work
5.I didn't use to traveling by train
6.I used to go to the church when I was a child.
7.We used to have much happier when i lived in the countryside
8.Mr. Michael used to grow tulips but he doesn't anymore.
9.I didn't use to listening to classical music when i was young
10.She used to not fat

Cho tam giác ABC và điểm M nằm trên cạnh BC sao cho BC=4BM . Hãy phân tích mỗi vectơ AM MC, theo hai vectơ AB AC