问题
选择题
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
答案：B
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。