2017年秋外研版必修1 Module5 Section Ⅰ课时作业含答案 Ⅰ.单词拼写 1．What is his reaction with your suggestion? 2．A good sleeping bag is an essential part of equipment. 3．Milk is liquid (液体)． 4．The members of the club discussed the problem for a whole afternoon, but they didn’t come to any conclusion. 5．When you heat a metal, it expands. 6．It is of great importance (重要) to learn English well. 7．I wonder if different substances (物质) will react. 8．Electric (电) lights should be kept out on a sunny day. 9．We learn chemistry by watching experiments (实验)． 10．A science (科学) lab is very necessary for a university.