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
列印
嵌入

排行榜

視覺風格

選項

切換範本

)
恢復自動保存: ?