that用作代詞的用法例句

　　What is the difference between this and that?這個和那個之間的區別是什么？

　　I walked to the gate that opened towards the lake.我走向那扇臨湖的大門。

　　The output of steel this year has increased by 20% compared with that in 1992.今年鋼產量比一九九二年增長了百分之二十。