Unit 1 The Changing World Section B (3a－3d) 同步练（含答案） 2026-2027学年英语人教版九年级上册

第五课时　Section B (3a－3d) 答案见活21 Ⅰ.根据句意填入适当的单词 1．　　　　 he returned, Mary and Simon had already gone. 2．John spent much time practising the English speech, 　　　　 he won first prize in the competition. 3．Teachers usually explain difficult knowledge 　　　　 different ways to help every student understand. 4．I...