Unit 2 单元重点知识检测课件 -2022-2023学年高中英语人教版必修第二册

21. an endangered species ______________ 22. living environment ______________ 23. take effective measure ______________ 24. a reserved seat ______________ 25. observe and preserve the reserve __________ 26. shoot at the goal ______________ 27. make a profit ______________ 28. heart attack ______________ 29. recover from an illness ______________ 30. threaten to do sth. ______________