第一节：完形填空（共10小题；每小题2分，满分20分）
阅读下面短文，掌握其大意，然后从21-30各题所给的A、B、C、D项中，选出最佳选项。
Wise buying is a positive way in which you can make your money go further. The way you go about purchasing an article or a service can actually 21 your money or can add to the cost.
Take the 22 example of a hairdryer. If you are buying a hairdryer, you might think that you are making the 23 buy if you choose one whose look you like and which is also the cheapest in price. But when you get it home you may find that it 24 twice as long as a more expensive model to dry your hair. The cost of the electricity plus the cost of your time could well 25 your hairdryer the most expensive one of all.
