参考如下：
I am helpful
I'm helpful to my teachers.because I help them to clean the blackboard.
I'm helpful to my classmates,because I help them to solve problems.;
I'm helpful to my mom,because I help her do the housework.
I'm helpful to my dad,because I help him bring a cup of tea.
I‘m helpful to my grandparents,because I read newspaper to them.
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