Every possible means_____ been tried，and we find only______ this means can we do it well．

A．have，in                         B．have，by

C．has，in                          D．has，by

Every possible means_____ been tried，and we find only______ this means can we do it well．

A．have, in　　　　　　　　　　　 B．have, by

C．has, in　　　　　　　　　　　　 D．has, by

Every possible means         to save the future of the baseball player so far.

A．was tried          B．were tried         C．have been tried     D．has been tried

.

Every possible means _________.However, nothing can ______him dying of cancer.