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1.A manatee eats(about 100 pounds) of food a day.(对划线部分提问)

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1.A manatee eats(about 100 pounds) of food a day.(对划线部分提问)
_______ _______food does a manatee eat a day?
2.They are trying to (help the enviormengt)..(对划线部分提问)
3.We planted many trees along the river.(改为被动语态)
1.How much (多少食物,后面跟food的时候,都是采用,How much的问法的,跟money 类似,也是how much money的用法)
2.What are they trying to do?
3.Many trees were planted (by us)along the river.
(这句话中,by us,在日常英语中通常是省去的,因为这种被动句通常有潜意思,即是我们做了这件事情,所以,很多句子从主动改成被动的时候,会省去原句的主语,但意思却不会改变.而且,在有些句子中,如果加了by someone的话,会显得累赘)
希望对你有帮助~~~