⑴ 課時新體驗三年級下冊第15課的答案
I. 1-5 BBCCA
II. 1. hurry 2. questions 3. crowded 4. among 5. Finally
III. 1. What is, doing 2. Whatshould, do 3. should not 4. No, needn』t 5.betternot
IV. 1. spreading easily among 2.keep away from / not go to 3. work on 4. allthe time