I don't think___possible to learn french and English at the same time A.this B.that C.it D.it'sI don't think___possible to learn french and English at the same time A.this B.that C.it D.it's为什么it 和it's都可以?

I don't think___possible to learn french and English at the same time A.this B.that C.it D.it'sI don't think___possible to learn french and English at the same time A.this B.that C.it D.it's为什么it 和it's都可以?
I don't think___possible to learn french and English at the same time A.this B.that C.it D.it's
I don't think___possible to learn french and English at the same time A.this     B.that     C.it        D.it's为什么it 和it's都可以?

I don't think___possible to learn french and English at the same time A.this B.that C.it D.it'sI don't think___possible to learn french and English at the same time A.this B.that C.it D.it's为什么it 和it's都可以?
it:think it possible 这里it 做think的宾语
it's：think it's possible 这里think后面省略了一个that,it做宾语从句中的形式主语

it's比较常用。think (that)+一个定语从句。possible这个时候是形容词。
it 还真没有见过这样的用法。。。那只能以possible是副词来理解了。it 在句中充当宾语。

i don't think 是插入语 只有it's 才是正确的选项
记住这个固定句型
it （主语） is（谓语）+adj + to

it 代指事物
it is加句子