Look! There is a whole crowd of people over there．Go and see what __________ and if it is a bargain，buy it．
| A．is selling | B．has been selling |
| C．is being sold | D．has been sold |
Since the new speed limits ______，the number of accidents in the area has fallen strikingly．
| A．were introduced |
| B．introduced |
| C．have been introduced |
| D．have introduced |
When Kerry and Sam met again two years later，each was pleased to see ____．
| A．the other | B．others |
| C．another | D．other |
Tony couldn’t remember ______he had turned off the computer before he left the office．
| A．that | B．where |
| C．when | D．whether |
All of us are pleased to see the problem ______ so quickly．
| A．solve | B．solving |
| C．to solve | D．solved |
She has been dreaming a future ____ she can spend more time growing flowers．
| A．that | B．when | C．where | D．which |