31. What is the main purpose of this passage?
(A)To compare online and in-store shopping.
(B) To introduce the tips of having good business.
(C)To recognize some tricks so as to shop smartly.
(D) To emphasize the importance of making shopping plans.

成為一個聰明的購物者是重要的。無論您是否知道，商家都在不斷努力讓您購買不需要的產品，或者購買的商品超過您真正想要的。這是他們使用的一些技巧：

將最昂貴的物品放在架子上的視線範圍內。通常，最好的便宜貨是在最底層的貨架上，沒人能看到。相反，您的眼睛自然會被最昂貴的物品吸引。

心理定價。商店使用“ 199美元”或“ 399美元”之類的價格，是因為您的大腦將“ 399美元”視為“ 300美元”，而不是“ 400美元”。

·免費樣品。吃少量美味的食物會使您想吃更多的東西。希望這會導致您購買樣品之前不想要的東西。

･買一送一。研究表明，這些看似“便宜的東西”誘使人們比平時多支出150％。

･存儲“折扣”卡。使用這些卡的人在雜貨上的花費比不使用這些卡的人多42％-通常是因為卡會員的“便宜貨”誘使他們購買不需要的產品。

專業收據。如果您屬於商店的積分計劃，那麼您可能會收到一張收據，上面有一張優惠券，用於一張商店知道您購買了很多東西的商品。這樣做的想法是給您一個小的折扣，以便您很快就會回來，並比平時花更多的錢。

這些只是許多商店說服您使用現金的許多古老技巧中的一些。下次購物時看看它們。如果您嚴格要求，只購買所需物品，那麼您將節省金錢。

Being a smart shopper is important. Whether you know it or not, stores are constantly trying to get you to buy products that you don’t need, or more products than you really want. Here are some tricks they use: 

･Placing the most expensive items at eye level on the shelves. Often, the best bargains are on the bottom shelves, where nobody looks. Instead, your eye is naturally drawn to the most expensive items. 

･Crafty pricing. Stores use prices like “$199” or “$399” because your brain processes “$399” as “$300,” not “$400.” 

･Free samples. Eating a small sample of something tasty makes you want to eat more of that item. Hopefully this will lead you to buy something you didn’t know you wanted until you ate the sample. 

･Buy one, get one free deals. Studies show that these seeming “bargains” induce people into spending 150 percent more than they usually do. 

･Store “discount” cards. People who use these cards spend 42 percent more on groceries than people who don’t—usually because the “bargains” for card members induce them to buy products they don’t need. 

･Specialized receipts. If you belong to a store’s points program, you may get a receipt that features a coupon for an item that store knows you buy a lot of. The idea is to give you a small discount so that you’ll come back soon and spend more money than you would have otherwise. 

These are just a few of the many age-old tricks used by many stores to persuade you to part with your cash. Have a look for them next time you are shopping. If you are strict and only buy what you need, then you will save money.

Being a smart shopper is important. Whether you know it or not, stores are constantly trying to get you to buy products that you don’t need, or more products than you really want. Here are some tricks they use: 

成為一個聰明的購物者是重要的。無論您是否知道，商家都在不斷努力讓您購買不需要的產品，或者購買的商品超過您真正想要的。這是他們使用的一些技巧：

What is the main purpose of this passage?
(C)To recognize some tricks so as to shop smartly.

part with sth. 放棄、離開

importance (N)重要性
emphasize (V)強調 重視、使突出 使明顯
trick (N)騙局 詭計 惡作劇、訣竅 秘訣 技巧
recognize (V)識別 認可 賞識 招呼
introduce (V)採用 引進 推行、介紹 引見
compare (v)對比 對照 比較、