Помогите пожалуйста выбрать правильный ответ.

1.While Lisa....a book,her brother was listening to music.
a.read
b.was reading
c.had been reading

2.You.....get a taxi to the aiport. I"II give you a lift,if you want.
a.mustn"t
b.don"t have to
c.can"t

1. While Lisa was reading a book, her brother was listening to music

2. You don't have to get a taxi...