问题补充:
All the students are busy English in the morning.
A. practising to read
B. practising reading
C. to practice to read
D. to practice reading
答案:
A. practising to read
(答案→)B. practising reading
C. to practice to read
D. to practice reading
解析:考查固定结构。Be busy doing sth .忙于做某事;practice doing sth .练习做某事。所以选B。