Only then ___________ to answer violence with violence.
| A．we decided | B．did we decide |
| C．decided we | D．were we decided |
When _______ this medicine, it is a good idea to avoid_______ alcohol.
| A．taking; drinking | B．taken; drinking |
| C．taking; to drink | D．taken; to drink |
To prevent the disease from spreading, all the infected（感染的）chicks were buried _______.
| A．alive | B．lively | C．live | D．living |
The footprints on the floor __________ that someone had broken into their house while they were out.
| A．recognized | B．forecast | C．indicated | D．observed |
Our country ________ great changes in the past 30 years and it is no longer________ it used to be.
| A．went through; what | B．has gone through; that |
| C．experienced; that | D．has experienced; what |
Not everybody knows exercising too much can_________ serious pain and even injuries.
| A．attach to | B．attend to |
| C．contribute to | D．devote to |