Teenagers ________ their health because they play computer games too much．
| A．have damaged |
| B．are damaging |
| C．damaged |
| D．will damage |
If we _______ adequate preparations, the conference wouldn’t have been so successful.
| A．haven’t made | B．wouldn’t make | C．didn’t make | D．hadn’t made |
I can hardly imagine Peter ________ across the Atlantic Ocean in five days.
| A．sail | B．to sail | C．sailing | D．to have sailed |
I can’t quite remember ________ I was taken to Beijing.
| A．that it was when | B．when it was that |
| C．when was it that | D．that was it when |
With more forests being destroyed，huge quantities of good earth ________ each year.
| A．is washing away | B．is being washed away |
| C．are washing away | D．are being washed away |
One of our rules is that every student wear school uniform while at school.
| A．might | B．could | C．shall | D．will |