双基限时练(十七) unit 12 grammar 1 ⅰ.单句语法填空(不多于3个单词) 1．tom enjoyed ____________________ (play) football when he was in school. 答案 playing 2．he pretended ____________________ (be) friendly with me. 答案 to be 3．go on ____________________ (do) the other exercises after
