Definition: a large piece of cloth put on a bed to lie on or under Level: B1
我在床上铺了一张干净的床单。
I've put a clean ___sheet on the bed.
我的床有一张柔软的丝绸床单。
My bed has a soft silk ___sheet.
请换一下客床上的床单。
Please change the ___sheet on the guest bed.
