look at this picture .At the top and of the river,a chemical

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look at this picture .At the top and of the river,a chemical factory and ……帮忙找一下这篇缺词填空
look at this picture .At the top and of the river,a chemical factory and paper-making factory are sending out many poisonous waste

在and of the river的and和of之间加上downstream（下游）,整句话就通顺了.
看这幅图,在这条河流的源头和下游,一个化工厂和一个造纸厂正在排放很多有毒废物.

look at this picture .At the top and of the river,a chemical look this picture! At the top of the river,a 有没有读过? 缺词填空把整篇 Then look at the picture at the top of the page and ask and Look at the picture at the top of the page为什么介词用at the top 不 Look at the picture. Look at the picture Look at this picture___________.Yes,it's a picture of the zo Come and have a look ___ the picture.A.to B.for C.at D.of Look at the picture of a family and write 5 sentences about 改错英语句子 1.Look at this picture.It's the picture of a farm.2.N Let( )have a look at the picture look at(a,the)picture .it is (a,the)picture of our schooi.