He commanded that all the gates _____when it was getting dark in case thieves came in .
| A．were shut | B．must be shut |
| C．could be shut | D．be shut |
We had better hurry.Our teacherus.
| A．wait for | B．must wait for |
| C．must be waiting for | D．has waited for |
—you please write a 3 000word report about this subject for me?
—Perhaps Ionly write a 1 000 word one,but I even doubt it.
| A．Could;might | B．Would;might | C．Might;could | D．Would;could |
Shelly had worked hard for her biology examination so that she could be sure of passing it at her first .
| A．attention | B．purpose | C．attempt | D．desire |
Shortly after the accident,two police were sent to the spot to keep order.
| A．dozen of | B．dozens | C．dozen | D．dozens of |
At a rough estimate,Nigeria is Great Britain.
| A．three times the size as | B．the size three times of |
| C．three times as the size of | D．three time the size of |