Nowadaysheavytraffic

来源：语文精选馆 1.54W

Nowadays heavy traffic______ can often be seen in the main streets during the rush hours.

A lights B jams C signs D rules

B. 此题主要考查对句意的理解。句末的”rush hours”是解题的关键，意为“高峰时间”。traffic lights：交通信号灯；traffic jams：交通堵塞；traffic signs：交通标志牌；traffic rules交通规则。