As is well known to us all, in China pigeons stand for peace. However, in India the wheel in its national flag is also a _______of peace.
| A．symbol | B．sign | C．mark | D．example |
33. He waited until it was dark ____ nobody could see him clearly.
| A．so that | B．in order to | C．although | D．However |
31. We should think of ways to stop the waste from the factory _____ our living environment.
| A．being polluted | B．polluting | C．from being polluted | D．Polluted |
28. As far as I know, this man ____ risk anything than lose the ring for his wife.
| A．would rather | B．had better | C．preferred | D．would like to |
27. She locked her room _____ a thief would break into it.
| A．in case that | B．for fear that | C．in case of | D．for fear of |
26. She said she would spend her holiday ___ Beijing.
| A．on | B．at | C．in | D．For |