His ruler is on the desk.His schoolbag is under the chair.合成一句
问题描述：
His ruler is on the desk.His schoolbag is under the chair.合成一句
答
His ruler is on the desk and his schoolbag is under the chair.
答
His ruler is on the desk whereas his schoolbag is under the chair.
答
His ruler is on the desk while his schoolbag is under the chair.
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