“ as often as you can,” our English teacher often tells us, “ you will make rapid progres

网友回答

A. Practice
B. To practice
C. Having practised
(答案→)D. Practising
解析：考查非谓语动词。句意“‘尽可能的多练习，’，我们英语老师常这样告诉我们，‘你们就会进步很快。’”两个逗号之间是插入语，去掉不影响句意，前后是两个分句，practising作主语。故选D。