I want to ring him＿＿＿to know the reason why he rang＿＿＿while I was speaking yesterday.
| A．up； off | B．back； up | C．up； down | D．on； off |
My family consider ____ a computer, which is considered ____ a great help in our work and study．
| A．to buy; to be | B．buying; being | C．to buy; being | D．buying; to be |
We don’t allow _______in the office．But you are allowed _____ in the rest room．
| A．smoking; smoking | B．to smoke; to smoke |
| C．smoking; to smoke | D．to smoke; smoking |
Peter was so excited ______ he received an invitation from his friend to visit Chongqing．
| A．where | B．that | C．why | D．when |
Nine in ten parents said there were significant differences in their approach to educating their children compared with ______ of their parents．
A．those B one C．both D．that
The fact that people are afraid to go out at night is often a result of perceived (感知) danger ________actual danger.
| A．other than | B．more than | C．rather than | D．better than |