New Words：

advertise ['ædvətaiz] v. 做广告；登广告；宣传
advertising ['ædvə.taiziŋ] n. 做广告；广告业；广告活动

Sample Sentences：

If you want to sell your product you must advertise it.
We sold the car through advertising in the local paper.
We should advertise for someone to look after our children.

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