New Words：

sheet [ʃiːt]
n.床单；被单；一张；一层；纸张；薄板
v.覆盖；展开；给…铺床单；铺开

Sample Sentences：

He looked as white as a sheet.
The road was covered with a sheet of ice.
My mother changes the sheets every week.
The little boy is learning how to sheet a bed.
He slid between the sheets and closed his eyes.
The rain was coming down in sheets(= very heavily) .
She wrote her name and address on a sheet of paper.

slid [slɪd] 动词slide的过去式和过去分词

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