----Who taught you Japanese? -- Nobody I learned it by.A. myselfB. myC. yourselfD. Him

问题补充：

----Who taught you Japanese?

---- Nobody, I learned it by.

A. myself

B. my

C. yourself

D. Himself

答案：

(答案→)A. myself

B. my

C. yourself

D. Himself

解析：句意：谁教的你日语？没有人教，我是自学的。by oneself意为“独自，亲自”，主语为我，所以应为by myself，故选A。