1.（2010•黄冈中考）—David has been away for more than 25 days.
--I miss him very much.You know ,25 days _______short. A.is B.isn’t C.are D.aren’t 【解析】选A 2.（2010•十堰中考）Climbing hills _________of great help to our health. A.was B.were C.is D.are 【解析】选C 3. （2010•宁夏中考）--