单选题
1.00分
Traffic reaches its rush hour between 8:00 and 9:00 in the morning.
参考答案: C
参考解析: 本句意思;交通早高峰在8点和9点之问。rush hour(上、下班的)高峰期。peak最高点, 山峰;border边界;goal目标;level水平。