The ambulance was just arriving, for a worker, who ______ the window on the second floor, fell off the window.
| A．had been repairing | B．was repairing |
| C．has been repairing | D．would be repairing |
Apples of this kind ____.
| A．tastes good | B．tastes well | C．taste good | D．taste well |
The police ____the murderer everywhere when he suddenly appeared in a theatre.
| A．is searching for | B．were searching for | C．are searching for | D．were searching |
John has two brothers， but either ____out of work now.
| A．are | B．is | C．has | D．have |
____can be done _____been done.
| A．All； have | B．All that； have | C．All； has | D．All that； has |
The Chinese people _____hard-working and brave.
| A．are | B．is | C．has been | D．are being |