It’s ten years since the scientist ___on his life’s work of discovering the valuable chemical.
| A．made for | B．set out | C．took off | D．turned up |
I ______ the time ______ so quickly.
| A．didn’t realize; had passed | B．don’t realize; passed |
| C．haven’t realized; passed | D．hadn’t realized; had passed |
______ terrible life the people in the mountains lived at that time！
| A．What | B．What a | C．How | D．How a |
Our teacher lives in a poorly decorated apartment, ______ the south.
| A．that window opens | B．the window of which opens to |
| C．whose window open to | D．the window of it opens to |
I was about to leave my house______ the telephone rang.
| A．while | B．as | C．when | D．and |
A computer costs about ______ of a typewriter.
| A．the nine-time price | B．nine times price |
| C．the nine times price | D．nine times the price |