Is Taiwan the first country _______ same sex marriage by law.
(A) which accepts (B) accepting (C) what accepts
(D) to accept (E) that accept (F) that had accepted
谢谢

首先, 您句尾要放个问号 "?".当先行词 "the first country" 里有序数时, 习惯上会使用that 而不是 which 来带关系子句, 所以最直白的写法就是"that accepts", 虽然它不在题目选项里, 但可以帮助把 A, C, E 三个明显错误的选项消掉.选项 B 是标准的 "将子句简化为分词词组" 操作, 也是正确的答案.选项 D 的 "to accept" 含有未来意味, 当关系子句内没有情态助动词就不宜使用, 除非转个弯将句首的 Is 改为 Was看起来才合理.选项 F 的 had 要改为 has 时态才正确, 虽然句意仍然有些别扭.