1.My mother had me______the house the whole afternoon

1.My mother had me______the house the whole afternoon
A.clean B.cleaning C.cleaned D.to cleaning
2.It is time for us to go to school .We must be______now
A.leave B.left C.off D.away
3.How does it ________that you are here,and not in London
A.come about B.explain C.appear D.become