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

听力原文

        (19) [A pair of entrepreneurs are planning to build and launch a spacecraft that would carry and roast coffee beans in outer space.] The craft will use the heat of re-entry to roast coffee beans as they float inside it in a pressurised tank. The effect would be to roast the beans all over and produce perfect coffee. The businessmen say that (20) [on Earth, beans can easily break apart and get burned in the roaster.] But if gravity is removed, the beans float around in a heated oven, receive 360 degrees of evenly distributed heat and roast to near perfection. The spacecraft will reach a height of around 200 kilometers. The beans would then be roasted in the heat generated by the craft’s 20-minute re-entry into Earth’s atmosphere. Temperatures in the pressurised tank will be kept to around 200 ℃. Once back on Earth, the planet’s first space roasted beans would be used to make coffee that would be sold for the first time in Dubai. This is where the pair’s company is based. It is not clear how much they would charge for a cup. Surprisingly, the Space Roaster concept, should it go ahead, will not be the first attempt to take coffee into space. (21) [In 2015, two Italian companies collaborated on the construction of a similar type of spacecraft, which was the first coffee machine designed for use in space.] 

19. What are a pair of entrepreneurs planning to do? （两位企业家计划做什么？）

解析：B。录音开头提到，两位企业家正计划建造并发射一艘太空船，运载咖啡豆到外太空中进行烘烤。B项内容均为原词复现，符合题意，故为正确答案。

错项排除：A项中的Taste coffee和C项中的Develop a new strain of在录音中都无依据，故均排除。D项利用录音中的pressurised tank设置干扰，但加压罐是用来烘烤咖啡豆的，而不是用来冲泡咖啡的，故D项错误。