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
