英语 (28 14:16:26)If only we____then the disease was curable._英语解答

英语 (28 14:16:26)
If only we____then the disease was curable.
A.knew B.couid knew C.had known D.would have known
答案是 C,为什么?

人气：188 ℃　时间：2020-08-30 14:36:02

解答

if only用虚拟语气,和wish的用法相同,
所以这里对过去的虚拟,用had known,意思是：如果我们那时知道这个疾病是可以治疗的,那就好了!