All the scientific evidence ______ that increasing use of carbon dioxide ______ the rise of the earth’s temperature.
| A．show; result in | B．shows; result from |
| C．shows; results in | D．shows; results from |
Who ________ that played a trick on the new English teacher?
| A．it was |
| B．was it |
| C．he was |
| D．was him |
—Where did you pick up the stamp?
—It was at the post office ________ we worked in the summer vacation.
| A．that |
| B．where |
| C．which |
| D．when |
—Was it by cutting down staff ________ she saved the firm?
—No，it was by improving work efficiency.
| A．when |
| B．what |
| C．how |
| D．that |
Is it that you often play computer games ________ worries your parents?
| A．why |
| B．that |
| C．which |
| D．what |
How time flies! It's in two months ________ we'll say goodbye to our high school life.
| A．before |
| B．that |
| C．until |
| D．when |