— The room is dirty.
— I know. It ______ for several weeks.
| A．hasn’t cleaned | B．didn’t clean | C．wasn’t cleaned | D．hasn’t been cleaned |
They showed me a medicine that was scientifically ______ from human hair and used in helping their growth.
| A．learned | B．chosen | C．prepared | D．separated |
It is said that there are millions of camels in India and _______ of them is growing.
| A．the number | B．a great number | C．a lot | D．a good many |
It was on a cold winter evening_______ his father left home and was never back.
| A．where | B．which | C．that | D．when |
We don’t need to do extra work this evening. The day’s work was almost ______ now.
| A．at the end | B．at an end | C．at one end | D．at our end |
－－The button in the kitchen is out of order.
－－_______.
| A．I’m really sorry to hear that. | B． No problem. It’ll be OK. |
| C． Anything else I can do? | D．Why not get Mr. Kidder to have a look |