问题补充:
He often English with the classmates.
A. practice speak
B. practices speak
C. practices speaking
D. practice speaking
答案:
A. practice speak
B. practices speak
(答案→)C. practices speaking
D. practice speaking
解析:句意:他常常和同学们练习说英语。结合语境可知本句描述的是客观性动作,故用一般现在时态。句子主语he是单数第三人称,故谓语动词用单数。动名词做宾语表示抽象动作,结合语境可知选C。