问题补充:
Mary wants to learn to study in England so she often practices English with her friends.
A. speaks
B. to speak
C. speaking
D. spoken
答案:
A. speaks
B. to speak
(答案→)C. speaking
D. spoken
解析:考查practice的用法。句意“玛丽想去英国上学,所以她经常和朋友一起练习说英语。”practice doing sth.“练习做某事”。故选C。