单项选择题A.He found a boy walking in the forest in the U.S.B.He taught a healthy boy how to have conversation with others.C.He taught a disabled boy some simple daily skills.D.He put his son in hospital.
单项选择题A.On June 12, 1806.B.On February 12, 1809.C.In the winter of 1816.D.In 1778.