What ______ will it make whether he knows this or not?
| A．sense | B．difference | C．mistake | D．use |
We rushed to the football court, only to see a sign _____ into the ground reading PERIODIC MAINTENANCE (定期维修).
| A．knocked | B．knocking | C．to be knocked | D．being knocked |
．— I don’t think we have met before.
— Yes, once at a party, but we _______.
| A．didn’t introduce | B．weren’t introduced |
| C．haven’t introduced | D．weren’t introducing |
_____ the Hope Project was carried out in this poor area, students here had no access to education.
| A．Once | B．As | C．Before | D．After |
Tom, turn down the music. Why you make such a big noise while your baby sister is sleeping?
| A．must | B．would | C．should | D．may |
．It rained for two weeks, completely _______ our holiday.
| A．ruined | B．ruin | C．to ruin | D．ruining |