登录
搜题
单项选择题
Questions 17-20 are based on the following passage. You now have 20 seconds to read questions 17-20.
What’ s the talk mainly about
A．Green house effect.
B．Garbage treatment.
C．Environment protection.
D．Over-packaging problem.
点击免费查看答案&解析
打开小程序，免费文字、语音、拍照搜题找答案
相关考题
填空题
What does "runoff" mean
