the zoologists tried to prove was that the photo of the South China Tiger had been staged or technologically dealt with.
| A．That | B．Why | C．Whether | D．What |
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 |
--- How come your father can read books in German?
--- Well, he____on a project with some German engineers for 3 years when he was young.
| A．worked | B．was working | C．had worked | D．would work |
It was reported that 115 miners__________ in the flooded mine for eight days were pulled out alive at last.
| A．trapped | B．being trapped | C．were trapped | D．had trapped |