随堂演练即时体验 巩固提升 ⅰ.词义辨析 1．exchange, change ①his new shoes didn't fit so he took them back to the shop and ________ them. ②would you mind ________ places with me so that i can be closer to the fire? 答案 ①changed ②exchanging 2．a number of, the number of ①________ the pages of this book is about 200.
