He ＿＿articles for our wall-newspaper these three years, and he ＿＿about forty articles.
| A．has been writing； has written | B．has been writing； wrote |
| C．is writing； has been writing | D．has written； has written |
—Do you know if Terry will go camping this weekend?—Terry? Never! She __________ tents and fresh air!
| A．has hated | B．hated |
| C．will hate | D．hates |
After the Six-Party Talk in Beijing, an agreement was reached __________ that North Korea would abandon __________ nuclear weapons.
| A．stating; to develop | B．stating; developing |
| C．to state ；to develop | D．states; developing |
There is a new problem involved in the popularity of private cars __________ road conditions need __________.
| A．that; to be improved | B．which ； to be improved |
| C．where ； improving | D．when ； improving |
We've been told the good news, but when and where to go for theexciting paid vacation __________ yet.
| A．are not discussed | B．have not been discussed |
| C．is not being discussed | D．has not been discussed |
In 1948，three American scientists invented __________ transistor, which is __________ small electronic device to control an electric current.
| A．the; a | B．a; a |
| C．the; the | D．a; the |