The teacher was absorbed in writing something, only _____ now and then to refer to a book or another.
| A．to stop | B．stopped | C．stopping | D． having stopped |
We have strong __________ for believing that the mine accident in Heilongjiang was due to the poor management.
| A．grounds | B．reason |
| C．cause | D．purpose |
—Hey, dear! Guess what? I’ve got a pay rise!
—This ________ a celebration! Let’s go to sing karaoke tonight.
| A．calls for | B．works out |
| C．brings about | D．pays for |
I’m terribly sorry to turn you down this time, but I promise I will ________ to you next time.
| A．pick it up | B．make it up |
| C．turn it up | D．set it up |
The moment we heard the news of the earthquake, we began to ________ the work to rescue those who were trapped in the building.
| A．set off | B．set down |
| C．set aside | D．set about |
.________ twice, the postman refused to deliver our letters unless we chained our dog.
| A．Being bitten | B．Bitten |
| C．Having bitten | D．To be bitten |