问题补充：
Come and see me whenever .
A. you are convenient
B. you will be convenient
C. it is convenient to you
D. it was he convenient to you
答案：
A. you are convenient
B. you will be convenient
(答案→)C. it is convenient to you
D. it was he convenient to you
解析：考查形容词convenient的用法。Convenient(方便的，便利的)其主语不能是人，只能是it等。It is convenient to sb对某人来说it是便利的。句意：在你方便的任何时候请过来看我。故C正确。
