本讲为2007年上半年新的教学内容，请对照教材和练习册听录音！       base A on B   A is based on B   Be based on   Highly limited   High  highly   Every one wants to fly ___ (high).   He speaks ____ (highly) of me.   How, who, when, where, why, which, what + to   I don’t know how to do it.   Whom   Benefit