—Mum, I'm sorry I ______ my English test again, though I tried my best.

—Oh, believe in yourself and you'll make progress at last. [ ]

A. passed

B. failed

C. had

D. took

维护祖国统一就是（）

A.一中一台

B.两个中国

C.承认世界上只有一个中国，承认台湾是中国领土不可分割的组成部分

D.天下炎黄子孙都属于中国