If the students who killed themselves had only been more confident, their deaths ________.

A. need have been avoided                                  B. must have been avoided

C. might have been avoided                                D. will have been avoided

If the students who killed themselves had only been more confident, their deaths ________.

1. A.
   need have been avoided
2. B.
   must have been avoided
3. C.
   might have been avoided
4. D.
   will have been avoided

If the students who killed themselves had only been more confident, their deaths ________.

A. need have been avoided                                B. must have been avoided

C. might have been avoided                               D. will have been avoided

If the students who killed themselves had only been more confident, their deaths ________.

If the students who killed themselves had only been more confident, their deaths ________．

A．need have been avoided                               B．must have been avoided

C．might have been avoided                              D．will have been avoided