Many young people don't work hard, and regret it later when the opportunity is gone.They only realize it________it is too late.
| A．when | B．before |
| C．in case | D．until |
Water,________seems so simple and common, is___________makes life_________.
| A．that; that; possible | B．which; that; impossible |
| C．which; what; possible | D．what; which; possible |
______as animals, the children came on the stage and started to perform.
| A．Worn | B．Wearing | C．Dressed | D．Dressed in |
The young dancers look so charming in their beautiful clothes that we took ____ pictures of them.
| A．many of | B．masses of | C．the number of | D．a large amount of |
Life in the oceans appears______different sizes, _______from the tiniest fish all the way up to the biggest blue whales.
| A．in ; range | B．of; ranging | C．at; to range | D．in; ranging |
I was just talking to Margaret when Jackson ______.
| A．cut in | B．cut down | C．cut off | D．cut up |