问题补充：
Come and visit me whenever .
A. you are convenient
B. you will be convenient
C. it is convenient for you
D. it will be convenient for you
答案：
A. you are convenient
B. you will be convenient
(答案→)C. it is convenient for you
D. it will be convenient for you
解析：convenient 方便的，不能用人做主语，常用句型it is convenient for sb，对某人方便的话，句意：无论什么时候对你来说方便的话过来拜访我。所以选C。
