作业帮21.______ is too much for a little boy to carry.
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21.______ is too much for a little boy to carry.
21.______ is too much for a little boy to carry.
21.______ is too much for a little boy to carry.
It.
意思是：太多了,一个小孩是搬不动的.
It
It is too much for a little boy to carry.
It
It ，是carry的宾语。carry it
it
It
It 形式主语指代to carry
such a heavy bag ; so much things