Not until the teenager left his hometown ________ how much he loved it.
| A．did he know | B．he knew |
| C．had he known | D．he had known |
Daniel’s family their holiday in Huangshan this time next week.
| A．are enjoying | B．are to enjoy |
| C．will enjoy | D．will be enjoying |
-– I wonder how much you charge for your services.
--- The first two are free the third costs $30.
| A．while | B．until | C．when | D．before |
We can never expect bluer sky unless we create less polluted world.
| A．a; a | B．a; the |
C．the; a | D．the; the |
A good friend of mine from I was born showed up at my home right before I left for Beijing．
| A．how | B．whom | C．when | D．which |
The play next month aims mainly to reflect the local culture．(C)
A．producedB．being produced C．to be produced D．having been produced