They had 8-day holiday during this National holidays, but some of them felt unhappy becau

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. an, the　B. a, the 　　　C. a, a 　　　D. an, a解析：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。

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