New Words：

drug [drʌɡ] n.药物；毒品

Sample Sentences：

The drug has some bad side effects.
Few teenagers in our city use drugs.
This drug is used to lower blood pressure.
The police found a quantity of drugs at his home.

effect [ɪˈfekt] n. 影响；作用；效果；效应
quantity [ˈkwɒntəti] n. 量；数量
a quantity of 大量的;一些;许多
quantities of 大量的;一些;许多

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