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 |
粤公网安备 44130202000953号