After _seemed like hours,the big fire was finally brought under c_英语解答

After _seemed like hours,the big fire was finally brought under control.
A.which B.it C.what D.that
正确答案是C,不懂为什么,我自己选的是B

人气：187 ℃　时间：2019-08-22 16:01:18

解答

好问题.
简单的解释是,在这个情况下,what 代表 "that which" 或 "something which" 的意思.用 what 而不用其他两个词语比较简洁.after that which seemed like hours？这个that是fire吗