第47題至第50題為篇章結構，各題請依文意，從四個選項中選出最合適者，各題答案內容不重複

        The lesson of comparative advantage is that while anything we do is worth doing well, not everything we do well is worth doing. A CEO who is a great cook still orders take-out, even take-out that is not as good as what the CEO can make. The cost of cooking is not just the grocery bill.     47   

        Consider Jane Galt, the pseudonym of an accomplished journalist who blogs on economics and policy.      48      She recently blogged on the best kitchen gadgets. Her descriptions made us want to buy all of them—Jane writes very well and her passion for cool stuff is contagious. A visitor to the site commented, perhaps tongue-in-cheek, that the failure of Jane to be hired as a copywriter for a kitchenware catalog was proof that markets do not work well.     49     Jane remains a journalist precisely because markets do work well—as good as she is at writing catalog copy, she is even better at journalism. For Jane to become a copywriter for a catalog would be very costly even though she is very good at it. I presume the kitchenware makers cannot pay her enough to bid her away from her day job as a journalist.

         50    Just because America could make fabulous televisions does not mean we should have a television industry. The cost of producing televisions means less of something else. It might be better to make that something else and trade with foreigners for televisions. Letting people outside the United States sell us televisions and cars and watches and steel and shoes frees up resources that allow us to make more of other things we value.

        How tall are you? Are you a skateboarder? Do you like to knit? Whoever you are, whatever you do, there is a scholarship for you! 

        Sure, there are scholarships for good athletes or for good students in need. But, what about the rest of us? In fact,there are some very surprising scholarships for everyone else. Believe it or not, there is a scholarship for skateboarders with a GPA of 2.5 or higher. These student skateboarders can receive $5,000 or $1,000 awards. There is also a scholarship for tall people. Women 5'10" or taller and men 6'2" or taller can apply. These tall students are eligible for$1,000 awards. Don’t worry, short people, there is a scholarship for you if you are 4'10" or shorter. You can get$1,000, too. A milk mustache scholarship goes to 25 students who are excellent students and athletes. They each get$7,500 and their pictures taken with a milk mustache! Finally, a wool competition awards $1,000 and $2,000 to students who knit wool clothes with excellent design and creativity. 

        So you don’t have to be a straight A student to get a scholarship. One counselor in our Financial Aid Office says,“It takes time and effort to apply for scholarships, but it is worth it!”