问题
选择题
If only we ____ the disease was curable then.[ ]
A. knew
B. could know
C. had known
D. would have known
答案
答案：C
搜题请搜索小程序“爱下问搜题”
If only we ____ the disease was curable then.[ ]
A. knew
B. could know
C. had known
D. would have known
答案：C