甘肃省2012届高三英语二轮专题集训：补全对话+单词拼写（19）补全对话：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.
