The flu is believed _______ by viruses that like to reproduce in the cells inside the human nose and throat.
| A．causing | B．being caused |
| C．to be caused | D．be have caused |
In our ______,anyone ______ breaks the law should be punished．
| A．opinions;that | B．opinions;who | C．opinion;he | D．opinion;who |
Even on a cold day he prefers ______ out to play football ______at home．
| A．going;rather stay | B．going;to staying |
| C．to go;rather than staying | D．to do;rather than to stay |
It was in the lab______ was taken charge of by Professor Zhang ____ they did the experiment．
| A．where, that | B．which, where | C．that, where | D．which, that |
—The railway station,please．I have to be there in ten min
utes．
—______,but I’ll do my best．
| A．No problem | B．OK | C．I can’t promise | D．I can’t do that |
—Is it for two months ______ they have stayed here?
—No,it is only three weeks ______they arrived here．
| A．that;since | B．that;when | C．when;that | D．since;before |