50.Xiao Duoduo is only a________boy,but he has to do lots of
50.Xiao Duoduo is only a________boy,but he has to do lots of sports like an adult.A.four year old
50.Xiao Duoduo is only a________boy,but he has to do lots of sports like an adult.
A.four year old B.four years old C.four-year-old D,four-years