Self Check任务任务 : 用适当的句子补全对话。A:1. B:I think the light bulb is the most useful.A:2. B:Thomas Edison.A:3. B:America.A:4. B:It was invented after many experiments.A:5. B:Yes,he invented lights,talking machines and so on.A:Perhaps he is the greatest inventor the world has ever known.What do you think is the most useful? Who was it invented by/Who invented it? Which country was he born in? How was it invented? Did he invent other things? all of a sudden 突然 ; 猛地all of a sudden 意为“突然、猛地” , 相当于 suddenly 。如 :All of a sudden/ Suddenly I heard a cry for help from the next door.突然我听到隔壁传来救命的哭喊声。All of a sudden/ Suddenly we saw a woman rushing out of the building.突然我们看见一位妇女从大楼里冲了出来。
