__________ the employees’ working efficiency, the supervisor will allow them to have a coffee break.
| A．Improving | B．To improve |
| C．Having improved | D．Improved |
Students are always interested in finding out they can go with a new teacher.
| A．how soon | B．how often | C．how long | D．how far |
–It’s thirty years since we last met.
-But I still remember the story, believe it or not, we got lost on a rainy night.
| A．which | B．that | C．what | D．when |
you have seen both fighters, will win?
| A．Since; do you think who | B．As; who you think |
| C．When; whoever | D．Since; who do you think |
–Who should be responsible for the accident?
-The boss, not the workers. They just carried out the order .
| A．as told | B．as are told | C．as telling | D．as they told |
He was busy writing a story, only once in a while to smoke a cigarette.
| A．to stop | B．stopping | C．to have stopped | D．having stopped |