As we all know，tigers and cats________the same family of beasts.
| A．belonged to | B．are belonged to |
| C．belong to | D．are belonging to |
At the meeting place of the Yangtze River and the Jialing River ______, one of the ten largest cities in China.
| A．lies Chongqing | B．Chongqing lies |
| C．does lie Chongqing | D．does Chongqing lie |
I took ______ possession of the house in 1970, but now it is in ______ possession of an old man.
| A．/; the | B．the; the | C．/; / | D．a; a |
I remember a ______ famous scientist said that we should believe in ourselves first of all.
| A．some | B．certain | C．sure | D．other |
We must not touch this switch under any ______.
| A．situation | B．atmosphere |
| C．circumstances | D．civilization |
I had written twice to Janet. But she didn't ______ my letters, so I decided to go there myself.
| A．return | B．reply | C．answer | D．receive |