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her ran over to send Xiao Ming to the nearest hospital. Fortunately, nobody else was injured in the incident. However, it taught us a good lesson. Never leave a bottle uncovered on the table. S2: I’ d like to tell you about one of the incidents in our chemical experiment. In the experiment, we used Bunsen burner. After the experiment, one of my classmates fot to cover it. About ten minutes later, a teacher passed the laboratory and smelt the odd smelling. She immediately entered the lab and put out the fire. Fortunately, n o further incident was caused. After that all the teachers and students were gathered to have a meeting. The headmaster gave a talk to emphasize the importance of safety in lab. That’ s a good lesson. T: Yeah, if the teacher didn’ t notice the incident, it would have been a terrible fire. We often think it’ s impossible to make an accident. But as a saying goes, “ It’ s not too careful to do a thing.” We should always keep the saying in mind. [來源 :學 167。 網(wǎng) Z167。X167。 while others may find it’ s dull, because they prefer art lessons. In our class, who enjoy studying science? And why? S1: I like studying science. I like maths best. When I work out a problem, I feel very happy. S2: I like chemistry. It’ s very interesting to see that you add one substance to another, and they react and change into a new substance. That is fantastic! T: Knowledge is power. Whatever subjects you enjoy learning, you should devote yourselves to them. Or you won’ t make any achievement. Now let’ s turn to page 49. Read the passage and answer this question: Why has Mark bee more interested in science? Give the students some time to do this in pairs, and then check the answ