I think It's my duty ______ make meals for my childen.不可灌水

I think It's my duty ______ make meals for my childen.不可灌水
I think It's my duty ______ make meals for my childen.
不可灌水

I think It's my duty ______ make meals for my childen.不可灌水
I think It's my duty __to____ make meals for my childen.
it 作形式主语,不定式to make meals ..作真主,
句意:我认为为孩子们做饭是我的职责.

to，望采纳！

to
动词不定式可以作主语，但是我们常常用it作形式主语，把动词不定式后置。如：
It is wrong to tell lies.
It is difficult to study Spanish.
It was wise of you to buy the house.
希望我能帮助你解疑释惑。

I think It's my duty to make meals for my childen.
It is +adj+（for sb）+to do sth
duty的用法：
it is one’s duty to do sth
去做某事是某人的责任
active duty 现役
continuous duty 连续使用,连续负荷...
...

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I think It's my duty to make meals for my childen.
It is +adj+（for sb）+to do sth
duty的用法：
it is one’s duty to do sth
去做某事是某人的责任
active duty 现役
continuous duty 连续使用,连续负荷...
customs duty 关税
death duty (英)遗产税
do duty for 起 ... 的作用...
duty bound 有责任(做某事), 感到...
duty officer 值勤官
duty ratio 负荷比,能率比...
go beyond one's duty 超越职权范围...
heavy duty 重型
intermittent duty 间歇工作方式,间歇负载...
light duty 轻型的(小功率的...
off duty 下班的
on duty 值班
periodic duty 周期运行,循环工作,循环...
point duty 值勤(站岗
specific duty 从量税
stamp duty <英>印花税
transit duty 通行税
varying duty 变动操作条件,变负荷,变...

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应该填THAT是同位语从句