Why is it _____ he can’t get along well with his classmates?
| A．/ | B．this | C．that | D．it |
The company had about 20 notebook computers but only one-thirdused regularly. Now we have 60 working all day long.
| A．is |
| B．are |
| C．was |
| D．were |
She went to the bookstore and bought.
| A．dozen books |
| B．dozens books |
| C．dozen of books |
| D．dozens of books |
It is reported that the floods have left aboutpeople homeless.
| A．two thousand |
| B．two-thousands |
| C．two thousands |
| D．two thousands of |
Professor James will give us a lecture on the Western culture, but when and where ____ yet.
【选项】
| A．hasn’t been decided |
| B．haven’t decided |
| C．isn’t being decided |
| D．aren’t decided |
A survey of the opinions of expertsthat three hours of outdoor exercise a weekgood for one’s health.
| A．show; are |
| B．shows; is |
| C．show; is |
| D．shows; are |