The river smells terrible. People_______ dirty things into it .
| A．must stop to throw | B．must stop from throwing |
| C．must be stopped to throw | D．must be stopped from throwing |
Jackie，you hang all your clothes in the room like this！
| A．wouldn’t | B．needn’t |
| C．mustn’t | D．oughtn’t |
It was not until the 18th century that man realized that the whole of the brain was involved in the working of the mind， ？
| A．was it | B．wasn’t it | C．did they | D．didn’t they |
The door burst open and ， shouting with anger．
| A．rushed in a crowd | B．in a crowd rushed |
| C．a crowd in rushed | D．in rushed a crowd |
There is a real possibility that these animals could be frightened， a sudden loud noise．
| A．being there | B．there having been |
| C．there was | D．should there be |
If any employee is found information regarding applicants and staff， he or she will be fired immediately．
| A．having leaked | B．leaked |
| C．leaking | D．to be leaking |