Air pollution is_most serious problem in many major cities and_measires should be taken to deal

分类: 作业答案 • 2022-01-12 20:49:29

问题描述：

Air pollution is___most serious problem in many major cities and___measires should be taken to deal
填哪个冠词

答

1.the(*名词短语前面用定冠词）
2.不填(measures表示手段,不用特指）

Air pollution is___most serious problem in many major cities and___measires should be taken to deal