问题
选择题
Peter is a brilliant language leaner. Within two weeks, he has developed a good _______ of Chinese and Japanese.
A．commitment
B．description
C．transformation
D．command
答案
答案：D
考察名词辨析。Commitment 承诺，保证 description 描述 transformation 转换，变形 command 命令，控制，指挥
A good command of sth 意为对……很精通
