B1U5 (Lead-in) Now watch a video clip and then answer the following questions about it. Getting to know the words and expression in the box below first might be helpful. 1. What did the first cellphones look like? In one of the speakers'words, they【填空1】 . 2. What did people realize when the first cellphones were invented? People realized that they 【填空2】 . 3. How fast do our cellphones send our thoughts across the world? They send our electrified thoughts【填空3】. 4. What can the cellphones do for us according to the woman? The maps on the cellphones can tell us【填空4】 . 5. What is the cellphone like according to the man speaking at the end of the video? It is like【填空5】.