作业帮Don't you think____important to protect our earth?A that B how C it D this 为什么要选C?如果it是作形式宾语后面不是应该是 it is important to protect our earth.为什么是 it important to protect our earth
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Don't you think____important to protect our earth?A that B how C it D this 为什么要选C?如果it是作形式宾语后面不是应该是 it is important to protect our earth.为什么是 it important to protect our earth
Don't you think____important to protect our earth?A that B how C it D this 为什么要选C?
如果it是作形式宾语后面不是应该是 it is important to protect our earth.为什么是
it important to protect our earth
Don't you think____important to protect our earth?A that B how C it D this 为什么要选C?如果it是作形式宾语后面不是应该是 it is important to protect our earth.为什么是 it important to protect our earth
因为整句句子做think的宾语,所以省略掉了,如果是整句句子的话就需要加上that,即don't you think that it is important to protect our earth?
这里的it指代to protect our earth。当一些宾语有很短的修饰语（这里是important)而宾语自己很长时，往往用it做站位宾语，然后把真正的宾语放句子末尾，避免中间重尾巴轻的问题。
英语是型合语，在此问句中think为谓语，it作形式宾语，真正的宾语是to。。。；而陈述句it is important to protect our earth. 中it作形式主语，其后必需有谓语动词is.
同意3楼的。Don't you think 后面跟的并不是一个宾语从句，只是一个结构：think it +形容词 + to do it是形式宾语， important 是宾补 ，to do真正的宾语。