The radio says that a terrible traffic accident happened sometime ________ 8 a.m. ________ 10 a.m. this morning.
I think your advice is of great ________ to me and it’s _______.
-- Look at that girl. Is it Susan? --No, it _______ be her. She has gone back to her home town .
________ great progress he has made this term ! He feels _______ .
To live a low-carbon life , we must try to save _____ energy and produce ____ carbon .
--Which do you prefer, Simon ,tea or milk ? -- ______ is OK . I don't mind .