Mr. Johnson insisted that he _____ his debts, but nobody believed him.
| A．pay | B．pays | C．paid | D．had paid |
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 |
__________ yesterday, we went out for a walk.
| A．As a fine day | B．It was a fine day |
| C．It being a fine day | D．For it was a fine day |