问题补充：
on everyday practice, progress in English is a goal which can be achieved．
A. Based
B. Basing
C. Having based
D. Being based
答案：
(答案→)A. Based
B. Basing
C. Having based
D. Being based
解析：考查非谓语动词作状语，短语：以什么为基础，be based on,在这里based on作状语，句意：以每天的实践为基础，在英语方面的进步是一个可实现的目标。所以选A。
