Question 19 is based on the passage you have just heard.

听力原文

        (19) [Sunshine and high temperatures can mean picnics and parks and trips to beaches, but they can make your body react in some strange ways.] First, sunshine can actually affect your breath. You may think that summer is the perfect time to go on a date or chat with an attractive boy or girl, (20) [but excessive heat can cause you to lose water, which has been proven to have a pretty unattractive side effect—bad breath.] When you are lacking water, your mouth becomes dry. Bacteria accumulates because there isn’t enough water in your mouth to wash it away. Sunshine can stop you from sweating too. The body’s normal temperature is 36 to 37℃, but if it heats up to 40 to 41 degrees, you may find yourself getting heat stroke. At that point, your heat regulatory system can essentially quit, which stops you from sweating as your body tries to keep water around your vital organs. (21) [However, the sun can have a positive influence on your body by raising your energy levels. You might feel like the sun is giving you extra energy for your day, which is actually happening.] And vitamin D from sunshine can help your body to absorb certain minerals, which are linked to building stronger bones. Therefore, I suggest you spend more time in the park with your friends, but make sure you apply lots of skin protection, and fill up those water bottles too.

19. What does the passage say about hot sunshine?（关于炽热的阳光，这篇文章说了什么？）

解析：C。录音开头提到，阳光和高温会让人的身体产生一些奇怪的反应（make your body react in some strange ways）。C项是对此内容的同义转述，故为正确答案。

错项排除：A、B、D三项分别利用录音中的beaches、picnics and parks和date设置干扰，但其中的crowded、turn into和creates a wonderful setting在录音中无依据，故均可排除。