He was busy writing the exam paper , only ___once in a while to check the time.
| A．to stop | B．stopping | C．to have stopped | D．having stopped |
—The game will certainly be exciting. Shall we meet at seven at the entrance to the gym?
— ________. But how can I get there?
| A．That’s all right | B．That’s right |
| C．I’m all right | D．All right |
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 |