单选题
Traffic reaches its rush hour between 8:00 and 9:00 in the morning.
Aborder
Bgoal
Cpeak
Dlevel
正确答案
答案解析
题干意为“早八点至九点是上下班交通高峰期。” 句中划线词组为名词词组，意为“上下班高峰”，C项peak意为“高峰”，例句：In order to get out of the peak-hour traffic, we must start early．我们得早点儿动身来避开交通高峰期。 A项意为“边界”,B项意为“目标”,D项意为“水平，级别”，故选C。