1．quantity n. 量；数量；数目
[教材原句] The problem begins when we add huge quantities of extra carbon dioxide into the atmosphere.
当我们向空气中排放大量的多余的二氧化碳的时候，问题就开始了。
(1)in quantity/in large quantities 大量地
(2)a quantity of或quantities of后既可接可数名词复数也可接不可数名词。
(3)“a quantity of＋名词”作主语时，谓语动词用单数；而“quantities of＋名词”作主语时，谓语动词用复数。
单句语法填空
①As a result of destroying the forests, a large quantity of desert ____________(cover) the land in the last few years.
②A large quantity of air conditioners ____________(sell) since the summer came.
③Large quantities of water ________________(pollute) recently, so the lake smells terrible.
④The seed was sprayed over the ground ________ large quantities by plane.
完成句子
⑤With more forests being destroyed, huge quantities of good earth ________________________ each year.
随着更多的森林被毁，每年有大量肥沃的泥土被冲走。
[答案] ①has covered ②has been sold ③have been polluted ④in ⑤are being washed away
[易错提醒] quantity与quality(质量)易混，要特别注意。
