根据对话内容，从对话后的选项中选出能填入空白处的最佳选项，并在答题卡上将该项涂黑，选项中有两项为多余选项。 A: Good morning, Betty. You look so weak. 1 B: It’s hard for me to breathe. 2 A: How long have you been like this? B: Since about two weeks ago. A: 3 B: There’s a chemical plant near our town, which produces such harmful gases that the air has been seriously polluted. A: 4 Pollution has caused too many environmental problems recently. We’d better do something to prevent it from going like this. B: 5 Shall we write a letter to the local government about the problem? A: Good idea. Let’s put it into practice at once. But…now I suggest you go to see a doctor first. B: Thank you. And maybe I’ll have to think about leaving this town and moving to a better place.
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