问题补充：
I use about two hours to do my homework every day.(同义句)
答案：
最常见的标准变化如下：
= I spend about two hours (in) doing my homework every day.
= I spend about two hours on my homework every day.
= It takes me about two hours to do my homework every day.
第一种变化中的in可以省略不写.
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======以下答案可供参考======
供参考答案1:
I have to do homework about two hours every day(不知对错哦)
