Unit 7 姓名________ 学号________ 班级________ 得分________一、听力理解 (略)二、单项选择 (每小题 1 分，共 15 分) ( )31. We must protect _______ environment, or it will be in ________ great danger.A. / ; /B. the; /C. the; theD. an; an( )32. — How soon will you finish your homework?— _...
