--Will you be__________ tonight, Mary?
--It depends. I’m afraid I’ll be called in by my manager.
| A．convenient | B．available |
| C．accurate | D．suitable |
Mathematics ____ the language of science.
| A．are | B．are going to be | C．is | D．is to be |
____ either of your parents come to see you recently?
| A．Have | B．Had | C．Has | D．Is |
Half of the fruit ____ bad.
| A．are | B．has | C．is | D．have |
When and where to build the new factory ____ yet.
| A．has not decided | B．is not decided |
| C．are not decided | D．have not decided |
More than one member ____ against the plan.
| A．is | B．are | C．has | D．have |