Read and choose.1)"Does Tim have to work at  night? "......"
A.Yes.he doesn't. B.No,he does. C. No,he doesn't. 
 2)Yoy......help me.I'm OK.
A.haven't. B.don't have to.C.doesn't have to.
3) .....work on Saturdays?A.I have to B.Do  I has to. C.Do I have to. 
4)Jim has to ..... the dishes after dinner
A. wash B.washes C.washing.
5) Linda ...... walk the dog in the evening.
A.don't have to B.does have to C.doesn't have to