【正确答案】 A

【答案解析】hang about: (1)闲待着，终日无所事事：(2) 闲荡；缓缓行走：He hung about outside my house. 他在我家房子外面转悠。hang back: 畏缩不前，退缩：We hung back in fear. 我们都吓很畏缩不前。hang on: (1) 紧握着(电话用语) 别挂断 (2) 专注；仔细听：The boy hangs on his teacher's very word. 这小男孩专心听老师讲的每句话。(3) 视…而定(hang upon); hangout居住；停留：He hangs out in an old house. 他住在一所旧房子里。hang up(1) 挂，悬：Hang your coat up. 把你的上衣挂起来。(2) 挂断电活 (3) 搁置；中止；拖延