50. Most of what has been done to the Simiths　___ of no great help．

　A．are　　　　　　　　 　B．is　　　　　　　 C．being　　　　　　　 　　D．to be

49. The government is working on improving their living ____ by providing larger houses.

A. situations　 　　　B. surroundings　 　　　C. conditions　 　　　　　D. environments

48. He shouldn’t be ___ from the team , although he didn’t do well in last match.

A. disappeared　　 　B. gone　 　　　　　　C. removed　 　　　　　　D. beaten

47.I can’t bear ___ like this , so I made up my mind to tell them what I really want.

A. to be treating　 　　B. to treat　 　　　　　　C. being treated 　　　　　D. treating

46.She was found ____ herself in the mirror.

A. to enjoying　 　　　B. to admire　　 　　　C. admiring　 　　　　　D. to enjoy