___ the employees' working efficiency, the supervisor will allow them to have a coffee break.
| A．Improving | B．To improve | C．Having improved | D．Improved |
To her disappointment, what she had devoted herself to ____ in nothing but failure．
| A．resulting | B．results | C．has resulted | D．resulted |
The word media basically refers to ____ we commonly call newspapers, magazines, radios and televisions．
| A．which | B．what | C．why | D．that |
Hard work and lack of sleep have ____ her beauty and youth in recent years．
| A．worn out | B．tried out | C．made out | D．sent out |
If there is any change about the time of the meeting, please inform us ____．
| A．at present | B．in the meanwhile | C．at times | D．in advance |
．The story goes ____ William Tell did kill the tyrant with that arrow．
| A．when | B．where | C．that | D．why |