单选题 They were late for class for there was a ______ in the traffic.
【正确答案】 A
【答案解析】hold-up在此处意为“停顿,阻碍”;hold-out坚持,不让步,坚持着;hold-of和 hold-on不常用做名词性词组。注意:hold-up的词义很多,如“支持,维持”;“展示”;“拦截,强夺”等。