2.A: How long has the chiken been cooking in the oven?
B: The chiken has been cooking for about twenty minutes.
3.A:How long has Car Schmidt been playing football for Brazil?
B: He's been playing for Brazil since the start of the season
4.A:How long has he been cleaning his motorbike?
B: He's been cleaning his motorbike for two hours.
5.A: How long have you been waiting to see the doctor?
B: I've been wainting to see the doctor since nine o'clock.
6. A:How long has your sister been living in Florida?
B: She's been living in Florida since over a year.