有“非洲屋脊”之称的是____，____是世界上最大的沙漠。

根据短文理解，选择正确答案。

    Tea to the Chinese is like coffee to the Americans. It's something that they can't live without.

    Chinese tea has a history of more than 5,000 years. It was most popular during the Tang Dynasty. China has many kinds of tea. White, yellow, green, oolong (乌龙茶), black and dark tea are the six main kinds.

    People in different places drink tea in their own way. People in Guangdong and Fujian love to drink “Kung Fu Tea” in small tea cups. They clean the teapot (茶壶) first with boiling water to warm it up. Then they fill the teapot with tea leaves before putting in the boiling water.

    In Beijing, people love jasmine flower（茉莉花）green tea. In Tibet, butter tea (酥油茶) is a popular drink to build up energy.

    There are rules to follow when we serve tea to others. Most importantly, remember to make the cup only seven-tenths full. If the cup is too full, it makes the cup too hot for them to hold.

【尊重师长 学会沟通】

放学铃声已经响了5分钟了，政治老师王老师终于宣布了“下课”。等王老师走后，小明和小亮凑在一起，小亮说：“刚刚明明是王老师讲错了，我给他指出来，他还说我是故意捣乱﹗以后我再也不好好上他的课了，没他的指导，我照样能学好﹗”小明说：“这个王老师整天板着脸，放学又老拖课，作业布置一大堆，简直就是‘老古董’﹗”