阅读下面材料，从A-D中选出与1-4图片相对应的广告技巧，并回答第5题。

Every day we see ads on TV, in magazines, on websites, on the street, and on our computer screens. Are you an ad detective? Can you understand the messages advertisers send you? To be an ad detective, it is useful to know how ads work. Let’s look at some typical advertising techniques.

A. Group pressure: An ad shows lots of people, each with their own cell phone.
Message: Everyone has a cell phone. You need one, too!
B. Testimonials: A famous pianist says he uses a certain brand of pianos.
Message: You’ll be good at playing the piano too if you buy this brand of pianos. Or because a famous pianist uses this piano, and you can trust the product.
C. Repetition: These ads mention the product many times and say wonderful things about it.
Message: You need to remember the product.
D. Time pressure: These ads use expressions like “Buy now! Half price this week.”
Message: You should buy the product quickly before you miss a great opportunity.

Ads are interesting, but you can make better decisions about what to buy when you know these techniques!

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【小题5】Which advertising technique do you think is the most useful? Why? (No more than 20 words)
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