精选优质文档-倾情为你奉上unit习题:( ) _ the board , child! Read the words on it after me.A. Look B. Look at C. See D. Watch( ) If you have difficulty in learning English, you should ask your teacher or your classmates _ help.A. for B. of C. in D. on( ) The young should _ the old _ advice at work.A. ask; for B. ask; to C. ask for; / D. asks; /( )The experts think that Indias population may be than chinas 2012.A. much; by B. more; in