Ⅰ. drill “练习” 指有组织,有指导地反复进行的练习。尤指在课堂上或军队里进行的教练。如:
Question-and –answer drills are important when yu are learning a foreign language.
Ⅱ. exercise 指为发展智力或锻炼身体而进行的练习。如:
① He is doing an exercise in English grammar.
② We do morning exercises every day.
Ⅲ. practice 是不可数名词,指为了达到熟练或完善的程度 而反复进行的练习。尤指在艺术、手艺或技巧方面。如:
Piano playing needs a lot of practice.弹钢琴需要多练。