问题补充:
Having lived in China for 8 years, Helen has a good of both English and Chinese.
A. ability
B. guidance
C. command
D. program
答案:
A. ability
B. guidance
(答案→)C. command
D. program
解析:考查名词和词组:A. ability能力,B. guidance指导,C. command命令,掌握,have a good command of“精通”,D. program节目,课程,句意:在中国生活了8年,海伦精通英语和汉语。选C。