He often English with the classmates.A. practice speakB. practices speakC. practices speak

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。