YOU SAID:

I'm supposed to be doing science homework xd

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私は理科の宿題を行うことになって午前 xd

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Supposed to do science homework I am xd

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理科の宿題を行うことになって私は xd さん

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Supposed to be doing my science homework and I xD

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私の理科の宿題と私 xD を行うことになって

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My science homework and I supposed to be doing xD

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私の理科の宿題と私は xD を行うことになって

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My science homework and I was supposed to do xD

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私の理科の宿題と私は xD をやるつもりだった

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My science homework and I was going to do it xD

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私の理科の宿題と私は xD をやるつもりだった

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My science homework and I was going to do it xD