sheet zone zone

例句：

1. 1. She spreads a sheet on the floor to make a bed.
   她在床上铺了一块床单。
2. 2. The sheets were stained with blood.
   床单上沾满了血。
3. 3. He folded the sheets and put them in the closet.
   他把床单叠好，放进衣柜里。