AIDS is said ________ the number-one killer of both men and women over the past few years in that poverty-stricken region where no medical services are available．

1. A.
   being
2. B.
   to be
3. C.
   to have been
4. D.
   having been

AIDS is said____the number one killer of both men and women over the past few years in that poor area, where no medical services are available.

       A．to be B．to have been     C．being D．having been

AIDS is said        the number one killer of both men and women over the past few years in that poor area, where no medical services are available.

A．to be         B．to have been           C．being           D．having been

AIDS is said____the number one killer of both men and women over the past few years in that poor area, where no medical services are available.

AIDS is said _____ the number-one killer of both men and women over the past few years in that region.

[　　]

A．being　　　　　　　　B．to be

C．to have been　　　　　D．having been