问题补充:
How much time do you often spend English every day?
A. to practice speaking
B. practicing to speak
C. on practicing to speak
D. practicing speaking
答案:
A. to practice speaking
B. practicing to speak
C. on practicing to speak
(答案→)D. practicing speaking
解析:句意,你通常每天花费多长时间来练习说英语。Spend (in) doing sth.花费(时间)干某事,spend on sth. 在某事上花(金钱或时间等),practice 后接动名词,不接不定式,故选D。