问题
选择题
Only when we saw the photos about the air crash ________ how terrible it was. [ ]
A. had we known
B. we had known
C. did we know
D. we knew
答案
答案：C
搜题请搜索小程序“爱下问搜题”
Only when we saw the photos about the air crash ________ how terrible it was. [ ]
A. had we known
B. we had known
C. did we know
D. we knew
答案：C