Scientists say they have found a way to produce the human body’s own cancer-killing cells through gene treatment, ____ new hope to cancer sufferers.
He's unlucky , and he's always suffering _____ luck one after another .
Our decision _____ was wise .
I'll have you ______ English in six months .
I couldn't have got to the meeting on time - _______ an earlier train .
I'd better not catch ______ that again !