问题补充：
that no one enjoys.
A. He seems; to be looked down on
B. He is seemed; being looked down upon
C. It seems; to be looked down upon
D. It seems; being looked down upon
答案：
A. He seems; to be looked down on
B. He is seemed; being looked down upon
C. It seems; to be looked down upon
(答案→)D. It seems; being looked down upon
解析：enjoy doing sth喜欢做某事，排除AC，It seems that...似乎..., 看来好像... ,句意：似乎没有人喜欢被人嘲笑。故用动名词的被动语态。选择答案D
