The time has come ______ we can make extensive use of nuclear energy．
| A．when | B．which | C．since | D．while |
I won't give you any help __ you tell me the truth．It's none of my business
| A．unless | B．since | C．as if | D．even if |
Although he is very young, he is much more experienced than others __working ability．
| A．in praise of | B．in terms of | C．in search of | D．in need of |
Good use___ the natural resources to improve people’s life in this area．
| A．has been made of | B．has made of |
| C．has made | D．has been made |
A great number of students said they were forced to practice the piano .
| A．to question | B．to be questioned | C．questioned | D．question |
—When shall we restart our business ?
—Not until we our plan .
| A．will finish | B．are finishing | C．are to finish | D．have finished |