Only when he read the newspaper _____ the US President Obama would deliver a speech in his university.
A.he knew | B.he had known |
C.had he known | D.did he know |
推荐套卷
Only when he read the newspaper _____ the US President Obama would deliver a speech in his university.
A.he knew | B.he had known |
C.had he known | D.did he know |