As the world’s population continues to grow, the ___of food becomes more and more of a concern.
He was in hospital for six months. He felt as if he was from the outside world.
---How far can you run without stopping?---- I’ve never tried.(2013,山东)
---What shall we do tonight then?---- ,whatever you want.(2012 .全国Ⅱ)
---- . ----That would be great! Please drop me off at the library.(2010.安徽)
---Do you have Mary’s phone number?---Sorry, .(2011 .重庆)