问题补充：
I value my friend Tom’s friendship very much, but I dislike his selfishness.
A. in addition
B. as well
C. on the other hand
D. in other words
答案：
A. in addition
B. as well
(答案→)C. on the other hand
D. in other words
解析：介词短语辨析。A另外；B也；C另外一方面；D换句话说；句意：我很珍惜Tom的友谊，但是另一方面我不喜欢他的自私。根据句意说明C正确。
