To protect the environment,more trees _____ in our country e

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To protect the environment,more trees _____ in our country every year
A plant B were planted C be planted D must be planted

D

情态动词被动语态： must be + 过去分词

从 every year 每年,一般现在时,排除B 一般过去时的被动语态

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To protect the environment,more trees _____ in our country e _____(protect)the environment,they will plant more trees alo How to protect our environment in our everyday life? 1.People think ( )more and more( )to protect the environment How to protect our environment 《How to protect our Environment》 The more trees we plant,the______(good)our environment is. people plant more and more trees to protect the earth it's our duty to help ____(protect)the environment It is our duty to protect the environment it is our duty to protect the environment. to protect the environment is our duty 同义句