在下面这段文字的横线处填入语句，衔接恰当的一项是（ ）
纸张发明之前，古人记事要用“竹简”。 。于是这道工序就叫做“汗青”。后来，“汗青”渐渐成为了“竹简”的代名词。
①将竹子削成形状一致的长条形，再用火反复烘烤这些竹片。
②古人用上好的竹子记写镌刻事情和文章，此一片片的竹即称“竹简”。
③烘烤之时，本来新鲜湿润的青竹片，被烤得冒出了水珠，像出汗一样。
④这样做一方面是为了便于书写，另一方面也为干燥防蠹。
⑤制作竹简一定要选择上等的绿色之竹，这就是所谓的“青”。
本段文字介绍竹简的制作。②句介绍什么是“竹简”，紧承上句“古人记事要用‘竹简’”一句；接着依次从选竹（第⑤句）、削竹烘竹（第①句）、烘竹的目的（第④句）、烘竹的状态（第③句）介绍，且第③句与后面“于是这道工序就叫做‘汗青’”衔接紧密。故选C。
Dogs are the best pets of humans. They come in all sizes. Some dogs are as small as a football, and others are as tall as a desk. Dogs’ fur (毛) is different, too. It can be long and soft, or smooth and hard. People don’t mind the kind of fur, because all dogs are good to hug.
请在字典中查一下这个词。
我喜欢甜食， 你知道的。
去年， 彼得在旅途中和许多人交了朋友。
我叫托尼· 史密斯， 史密斯是我的姓。
我们在课上回答问题时应该起立
Tea and coffee are two of the most popular drinks in the world. However, people usually like one more than the other. These drinks also have very different uses.
People in the office usually sit for most of the day when they work. But this is bad for a person’s health. When people sit for too long every day, they don’t move very much. So it is easy to start getting fat. Sitting too long is also bad for their work because it makes them want to sleep. When this happens, people may make more mistakes in their work or spend more time finishing their work. Companies need workers to be healthy, so how do they fix the problem?
