the train was ____ for nearly half an hour.
问题描述：
the train was ____ for nearly half an hour.
a.held back b.held on c.held out d.held up
答
选d
hold back阻止（某人或某物）向前移动,阻碍（某人正常发育）,隐瞒
hold on稍等,别挂断
hold out把（某物）提供给（某人）
hold up延误,拦路抢劫,提出（某人或某物）作为榜样
此句取“延误”之意,全句意思为：火车晚点近半小时.