听力原文
Multiple Choice:Q15-18
     

Will you enjoy a cup of orange juice every morning? My advice is please make sure that you do so. Orange juice is an integral part of a healthy diet. Today the flavor of orange is the world’s third favorite flavor next to chocolate and vanilla. As a common kind of fruits, the orange has additional nutritional contents than other citrus fruits. The major nutritional content in oranges is vitamin C. As a whole, the vitamin C content in orange fruits can keep your immune system strong and healthy. Another nutritional content in oranges is calcium. It can ensure strong teeth and bone. Calcium also supports to maintain a healthy blood pressure level. Calcium in oranges also assists for a healthy muscle function. The health benefits of the orange never end here. A daily glass of orange juice can help prevent the recurrence of kidney stones, better that other citrus fruit juices, such as lemonade. The fiber in the orange reduces high cholesterol level in the body. The natural food sugar, fructose in the orange controls the rising blood sugar levels after a meal. So next time you go to a supermarket or dine in a restaurant, make sure that you buy and have that delicious food as a part of your everyday diet.

15. What is the main idea of this talk?
16. According to the talk, which of the following is the world’s first favorite flavor?
17. What is good about vitamin C in the orange?
18. Which of the following assists for a healthy muscle function?