__________ environmental damage is done, it takes many years for the ecosystem(生态系统) to recover.
| A．Even if | B．If only | C．While | D．Once |
I was just talking to Margot when Jackson ____.
| A．cut in | B．cut down | C．cut off | D．cut up |
This picture was taken a long time ago. I wonder if you can ________ my father.
| A．find out | B．look out | C．speak out | D．pick out |
We watch the children _______ into the water from the _____ board.
| A．diving; diving | B．diving, dived |
| C．dived; dived | D．dived; diving |
Peter’s jacket looked just the same as Jack’s, but it cost ___________his.
| A．as much twice as | B．twice much as |
| C．twice as much as | D．as twice much as |
As long as you’ve paid in ___________, we won’t charge you for the delivery.
| A．charge | B．need | C．return | D．advance |