My father insisted that every minute ________ made full use of ________ the work well.
| A．be；to do | B．has been；doing |
| C．be；doing | D．has been；to do |
One primary goal of UNESCO is to ______ a modern knowledge society in which all people can participate in information and knowledge.
| A．make up |
| B．polish up |
| C．build up |
| D．give up |
It was obvious that Climate Change Conference in Copenhagen became the ______ of media attention.
| A．discovery |
| B．focus |
| C．summary |
| D．comment |
The government is trying to ______ pollution to an even lower level so that we can have a better environment.
| A．reduce |
| B．remove |
| C．collect |
| D．warn |
At times the balance in nature is ______, resulting in a number of possibly unforeseen effects.
| A．confused |
| B．puzzled |
| C．disturbed |
| D．troubled |
Congratulation! It seemed that our boss was ______ with your work today.
| A．dishonest |
| B．confused |
| C．satisfied |
| D．disturbed |