A person a foreign language must be able to use the foreign language　 all about his own.A

问题补充：

A person a foreign language must be able to use the foreign language all about his own.

A. to learn, to forget

B. learning, to forget

C. to learn, forgetting

D. learning, forgetting

答案：

A. to learn, to forget

B. learning, to forget

C. to learn, forgetting

(答案→)D. learning, forgetting

解析：可联系答.案.网客服索取。