By dint of much practice he became ______ and was able to sign his name with either hand.

学历类 公共英语 已帮助 人

By dint of much practice, he became ______ and was able to sign his name with either hand.

A.practical

B.tricky

C.ambiguous

D.ambidextrous

热搜:a是b的充分条件,b是a的必要条件吗