Dogs have a very good ___________ of smell and are often used to search for survivors in an earthquake.
| A．sense | B．view | C．means | D．idea |
There has been noso far from the police about the cause ofthe poor girl’s death after the college entrance examination.
| A．comment | B．command | C．discussion | D．reaction |
These experiences ______ me _____ the drug’s harmful effects.
| A．are convinced; by | B．convinced; of | C．were convinced; by | D．convinced; at |
— Did Alan enjoy seeing his old friends yesterday?
— Yes, he did. He _____ his old friends for a long time.
| A．didn’t see | B．wouldn’t see | C．hasn’t seen | D．hadn’t seen |
— Have you handed in your schoolwork yet?
— Yes, I have. I guess it ______ now.
| A．has graded | B． is graded | C． is being graded | D． is grading |
At the end of the meeting, it was announced that an agreement ______.
| A．has been reached | B．had been reached | C．has reached | D．had reached |