It is ______ great pleasure to meet the expert who is doing research on _________ archaeology.
| A．/ ; | B．/; the | C．a; the | D．a; / |
China first agreedthe six-party talks about North Korea nuclear weapons program.
| A．to attend | B．to join | C．to participate in | D．to take a part |
It is wise of you towell trained workers for untrained ones in your workshop.
| A．substitute | B．change | C．exchange | D．employ |
Many students listened to the lecture, but I wondered how much they.
| A．took out | B．took up | C．took off | D．took in |
The customs office isyour luggage is inspected when you enter or leave a country.
| A．where | B．when | C．why | D．who |
We are proud of our hometown, which isin coal and natural crystal（水晶石）.
| A．abundant | B．universal | C．remote | D．autonomous |