每句只有一个错误。按下列情况改正:
该句多一个词，把多余的词用斜线( \ ) 划掉，在该行右边横线上写出该词，并也用斜线划掉;
该句缺一个词，在缺词处加一个漏字符号(∧)，在该句右边横线上写出该加的词;
该句错一个词，在错的词下划一横线，在该句右边横线上写出改正后的词。
注意:不要改动原句的意思。注意格式正确。
There was snow in the ground at the time. Then    _______
Benjamin Franklin put two large pieces cloth over the        ____
snow. One piece of cloth was black in color, other piece       ____
was white. Then he waited for until the sun began to shine.      ____
After several hours he looked under the piece of cloth      ____
and looked that the snow under the black cloth       _____ _
melted much fast than the snow under the white      _____  _
cloth. This proved to him that the black cloth hold the heat       ____
better than white cloth. Soon after this, people began to     ___   __
dress white clothing and white hats during the summer.      ____ __