“Facial transplants are no longer science fiction imagination ,”a surgeon has said,____that they are ___possible but  technically complex..

—I’ll talk to my son Bill about it as soon as possible． He usually listens．—We need _______ listening． We need action．

As the idea of low-carbon life is now _____ accepted, more and more people travel by public transport.

I  , but my mother didn’t   .

The meeting was long and the speakers said ______nothing worth listening to.