1、第19—21课词语辨析练I.用所给单词或短语的适当形式完成下列句子。(pass;past)1.It’shalf______sixnow.Let’sgohome.2.Ifyouworkhard,you’ll______theexam.3.He found a book when he went ___________the store window.(must;haveto)4.Thisstorybook_________beJenny’s.Hernameisonthecover.5.Shedoesn’t_________gofarifshegoesshopping.II.根据