When he was sixty years old he his hometown.A. returnedB. returned backC. returned toD.

问题补充：

When he was sixty years old, he his hometown.

A. returned

B. returned back

C. returned to

D. went back

答案：

A. returned

B. returned back

(答案→)C. returned to

D. went back

解析： return 归来，回来，不再和副词back连用。