问题补充:
— He is working hard now.
— He tries English. So he practices English every day.
A. to learn, to speak
B. learning, speak
C. to learn, speaking
D. learning, to speak
答案:
A. to learn, to speak
B. learning, speak
(答案→)C. to learn, speaking
D. learning, to speak
解析:句意:他现在正在努力学习。——他努力学习英语。因此他每天练习说英语。不定式作宾语表示具体将要进行的动作,现在分词作宾语表示抽象的反复发生的动作,结合语境可知选C。