___ they plant trees in this area every year,the tops of some hills are still bare.A.Although B.Unless C.Since D.Once

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___ they plant trees in this area every year,the tops of some hills are still bare.A.Although B.Unless C.Since D.Once

___ they plant trees in this area every year,the tops of some hills are still bare.A.Although B.Unless C.Since D.Once
___ they plant trees in this area every year,the tops of some hills are still bare.
A.Although B.Unless C.Since D.Once

___ they plant trees in this area every year,the tops of some hills are still bare.A.Although B.Unless C.Since D.Once
a

More trees ___(should plant) in China. They------(plant) some trees last year. We will plant another ten trees this afternoon.We will plant ___ ___ trees this afternoon They came here ___(plant) trees.用所给词的适当形式填空请说明原因 when do peopie usually plant trees?they usually plant trees in（ ）. Trees ___often ___（plant ）in spring明天要交啊!急. they went to plant trees last week.(变成一般疑问句) they went to plant trees last sunday.英语一般疑问句 They plant some trees last weekend改正错 They will plant more trees nert month变成被动语态 They are going to____(plant) trees on the mountain tomorrow. They (plant trees) in spring.对划线部分提问 They plant 10 trees every year.改成被动句 They spend the whole day____(plant) trees on the hill They went to plant trees 改为现在时 They will plant trees together.(改为一般疑问句) 用所给词的正确形式填空they can_______(plant)trees in spring .look,they are__(plant)trees now 1.The two girls ___ (stop) talking when they saw me2.What did you see,Susan?I saw many people __(plant) trees on the hill