Please take good care ____ your children. In order ____avoid any accident, please do not let them run or romp about ____ the coach, or climb the seats or hold the crack ____the door or touch the electric water boiler.
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【单选题】听力原文:W: Excuse me, Professor Hill, may I ask you a few questions? M: Yes, of course, But I'm sorry I have a class to attend. Why don't you come in my office hours, that's 4 to 5 p.m, Monday, Thursday ...