We had _______ 8-day holiday during this National holidays, but some of us felt unhappy because of _________heavy traffic on the highways.

A. an, the  　　　            B. a, the 　　　        C. a, a 　　　      D. an, a

 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

There is ______ "s" in the word "swim" and it is ______ first letter in it.

[　　]

A. an...the　　B. a...the　　C. an...a　　D. /...the

-Does Heze have　　 airport?

-No, but we can take　　 bus to Jinan or Zhengzhou.

　 A. an; the　 B.an;a　 C.the;a　 D.a:a

 We had _______ 8-day holiday during this National holidays, but some of us felt unhappy because of _________heavy traffic on the highways.

A. an, the  　　      B. a, the 　　　    C. a, a 　　　           D. an, a