---How did your students express their thanks to you on Teachers’ Day?
---A gift together with many flowers _______ sent to me .
| A．is | B．are | C．was | D．were |
Rainforests __________ and burned at such a speed that they will disappear from the earth in the near future.
| A．cut | B．are cut | C．are being cut | D．had been cut |
_______ the rain falling so hard, it becomes more and more difficult to carry on the rescue work.
| A．Since | B．As | C．With | D．For |
At a beach or a swimming pool a lifeguard is a person who is responsible for __________ other swimmers and protecting them from accidents.
| A．turning to | B．watching over | C．watching out | D．digging out |
The factory produces half a million pairs of shoes every year, 80% are sold abroad.
| A．of which | B．which of | C．of them | D．of that |
Her valuable advice ________ to be taken, or you will suffer more loss.
| A．deserves | B．survives | C．serves | D．proves |