You cannot accept an opinion________to you unless it is based on facts.(2013·湖南，29)
| A．offering | B．to offer |
| C．having offered | D．offered |
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 |
Peter is a brilliant language learner. Within two weeks, he hasdeveloped a good __________ of Chinese and Japanese.
A. customB. imagination
C. exceptionD command