The students had the lights for almost three hours.
| A．to burn | B．burning | C．burnt | D．to be burning |
There is _________ that her daughter will pass the exam to go abroad to study.
| A．chances | B．likely | C．a high chance | D．possible |
The key _________ the string was put into the door to stop the kite _________.
| A．tie to;flying away | B．tying to;fly away |
| C．tied to;flying away | D．tied to;fly away |
_________ that he had fallen behind,he tried to work harder.
| A．Having realized | B．Realized | C．Realize | D．To realize |
Plastic and rubber won't _________ electricity,but copper will.
| A．have | B．do | C．pass | D．conduct |
____no need for us to discuss the problem again since it has already been solved.
| A．It has | B．There has | C．We have | D．There is |