问题
选择题
They had _____8-day holiday during this National holidays, but some of them felt unhappy because of _____heavy traffic on the highways.
A．an, the
B．a, the
C．a, a
D．an, a
答案
A
题目分析：句意，他们国庆期间有一个八天的假期，但他们中有些人不高兴，因为高速路上台多的车子。第一空，元音前用an,第二空，traffic是不可数名词，不能选a,故选A。
考点：