He _____the job well, but he ____so careless.
| A．had done; had been | B．could do; was |
| C．could have done; was | D．hadn’t done; had been |
Both rice and wheat ____ grown in that country.
| A．is | B．are | C．was | D．has |
They both have some friends; but his ____ more active.
| A．is | B．will be | C．was | D．are |
The following ____ some other examples.
| A．are | B．is | C．was | D．were |
My family ____ small.
| A．is | B．were | C．are | D．makes |
Mathematics ____ the language of science.
| A．are | B．are going to be | C．is | D．is to be |