问题补充:
He tries English well, so he practises English every day.
A. to learn; to speak
B. learning; speaking
C. to learn; speaking
D. learning; to speak
答案:
A. to learn; to speak
B. learning; speaking
(答案→)C. to learn; speaking
D. learning; to speak
解析:try to do sth,表示努力做某事,try doing sth,表示试着做某事,而practice doing sth ,表示练习做某事,故选C