IV. 单项选择 (共15小题，每小题1分，计15分) 选出可以填入空白处的最佳选项。( )16. Do you take a bus home after _ school?No. I go home by _ bike.A. a; aB. a; / C. /; a D. /; /( )17. My English teacher is good with us. She is like our mother _ us.A. for B. at C. to D. with( )18. _ does your mother usually go to work, Tony?She takes the subway to work.A. When B. How C. What D. Where( )19. Its good for people _ after dinner.A. walk B. wa
