阅读短文，选择正确答案。

    The bell rings (响). Mr. Wang goes into Class Three and wants to give an English lesson. At this time Mr. Zhang comes and asks him to attend (参加) an important (重要的) meeting. So Mr. Wang says to his students, "Study by yourselves, please."

     When Mr. Wang comes back,he sees Zhao Yang talking with his desk mate Li Cheng.

   “Stand up, Zhao Yang," says Mr. Wang, "What are you doing?"

    "I'm reading English," says ZhaoYang.

    "What's in your hand?" says Mr.Wang.

     ZhaoYang looks at his hand. It's a history book.Then he looks at Li Cheng. There is an English book in his hand. So he says, “Sorry, Mr. Wang. We are studying the history of England."

材料一                                                      

材料二：“（汉朝）把秦始皇所建以防匈奴的万里长城向西边延长出去。古长城之向西延长最初的用意自然是保护新开通的通中亚的大道……”

                                         ——《斯坦因西域考古记》

如图描述了解放战争期间某一阶段的战略态势，图中的“尖刀”表示的是（　　）

对下列广告语所用的修辞手法判断正确的一项是(    )。

①人类失去联想，世界怎能丰富多彩?

②为何血浓于水?因有爱在其中。

③风儿唱着歌，唤醒了沉睡的大地。

④牛奶香浓，香飘十里。