—Can you tell me how many people will go to the exhibition?
—Of cours e. About 3,000 students from 15 schools ______, and I think two-thirds will come.
| A．invite | B．will invite |
| C．have been invited | D．had been invited |
Not until he left his home ________ to know how important the family was for him.
| A．did he begin | B．had he begun |
| C．he began | D．he had begun |
—It's nice.Never before ________ such a special drink!
—I'm glad you like it.
| A．I have had | B．I had |
| C．have I had | D．had I |
For a moment nothing happened.Then ________ all shouting together.
| A．voices had come | B．came voices |
| C．voices would come | D．did voices come |
Only after Mary read her composition the second time ________ the spelling mistake.(2012·天津)
| A．did she notice | B．she noticed |
| C．does she notice | D．she has noticed |
Never before ________ seen anybody who can play tennis as well as Robert.(2012·江西)
| A．had she | B．she had | C．has she | D．she has |