这道题改选since then (A)还是 from then on(B) They met in 1998 and _______ they were best friends.
这是来自初中英语资料上的原题.
since then (A)与 from then on(B)两个选项同时出现,我相信很多人都搞不定.我也相信这两个短语之间可能会有区别.如果这道题的命题人看到了这个题,请你出来给大家讲一下你的命题构想.