随堂演练即时体验 巩固提升 ⅰ.单句语法填空(不多于3个单词) 1. do you know where they are____________ (head)? 答案与解析 heading head vi.“朝……去”。 2．she ____________ (knife) him on the back and now he is still in bed. 答案与解析 knifed knife vt.“用刀子刺”。 3．some parents have ____________ (voice) concern about their children's safety.
