1、How long ____ she ____?

1、How long ____ she ____?
Since she was 15 years old.
A.has;been dancing B.was;dancing C.did;dance D.will;dance
2、Fat people can't ____ hot weather.
I agree with you .They’d better stay in cool places.
A.sit B bears C stand D put up
3、-- Could you please clean the car?
--_____
A.Ok.I'll do it in a minute
B.You're welcome
C.It doesn't matter
D.Never mind