Unit 9 Communication Lesson 52 The Power of a Smile综合练习（含答案）.docx
Unit9 Lesson52 综合练习
一、用括号中所给单词的适当形式填空
1. She noticed someone _______ (walk) behind her.
2. With the increasing number of babies, the environmental problems will get _______ (bad).
3. Jim tried to make himself _______ (understand).
4. I will never give up when I face any _______ (difficulty).
5. They...