I _____ Wang Tao in the street yesterday. We _____ each other since he went to Beijing.
| A．met, didn’t seen | B．have met, hadn’t seen |
C．met, haven’t seen | D．met, hadn’t seen |
Our research has focused on a drug which is so _____ as to be able to change brain chemistry.
| A．powerful | B．influential | C．monstrous | D．vigorous |
The boy slipped out of the room and headed for the swimming pool without his parents’ _____.
| A．command | B．conviction | C．consent | D．compromise |
We won't know whether it will be successful. We won't know whether there will be good _____.
| A．ends | B．results | C．effects | D．causes |
The government placed _____ on the numbers of foreign cars that could be imported.
| A．limitations | B．restraint |
| C．requirements | D．restrictions |
. He ate what he could, and gave the _____ of the food to the birds.
| A．remain | B．uneaten | C．rest | D．part |