This morning traffic was by an accident outside the town hall.A. held offB. held upC. hel

问题补充：

This morning traffic was by an accident outside the town hall.

A. held off

B. held up

C. held on

D. held over

答案：

A. held off

(答案→)B. held up

C. held on

D. held over

解析：考查动词短语。句意:今天早上在市政大厅外交通为一事故所阻。hold off 抵制； hold up举起；阻挡；hold on不挂断电话，等一下；继续；hold

over延期；以…威胁; 结合句意可知选B。