It was not until all the fish in the pond died that________ the situation was serious.
| A．did he realize | B．he realized |
| C．he had realized | D．had he realized |
推荐试卷
It was not until all the fish in the pond died that________ the situation was serious.
| A．did he realize | B．he realized |
| C．he had realized | D．had he realized |
试题篮
()
粤公网安备 44130202000953号
