Mrs. Le explained that the burning of coal led to air pollution., , Nam said he had to present his paper on endangered animals the following week., , Linda asked the speaker if human activities have an impact on the environment., , Nam asked Mai what environmental projects her school was working on., , Tom said to Nam that he would read more articles before writing the essay., .

Task 1

由
打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？