Children need friends ________ their own age to play with.
| A．of | B．for | C．in | D．at |
Was it because she was ill______she didn’t go to attend the meeting?
| A．what | B．which | C．as | D．that |
The machine has been used for several years. It needs______.
| A．to repair | B．repaired | C．repair | D．repairing |
Be quiet______you will wake the whole house!
| A．or | B．and | C．so | D．but |
—Are you still employed at the post office?
—Yes，I______here since 1982.
| A．work | B．have been working | C．worked | D．had been working |
_____a written permission, he had to write another letter to the president of the university.
| A．Not giving | B．Not having been given |
| C．Having not given | D．Having not been given |