问题补充：
, I’ll visit you next Sunday.
A. If you are convenient
B. If it is convenient to you
C. If you’ll be convenient
D. If it’ll be convenient to you
答案：
A. If you are convenient
(答案→)B. If it is convenient to you
C. If you’ll be convenient
D. If it’ll be convenient to you
解析：考查convenient的用法。形容词convenient的主语不能是人，只能是it。it is convenient to you指对你方便。句意：如果你方便，我下周日来看你。根据句意说明B正确。
