iv write setences as directed

1 my mother had fewer days off last year than my father .=> my father

2 how much is the green car ? viet lai cau voi tu cost .

3don"t play near the lake behind the house .viet lai cau voi tu should 

4 the students had a medical check-up yesterday morning =>the student ..........  cau hoi duoi .

they bought some books for me .chuyen sang cau nghi van