题目内容
() 4. The Dongying-Hainan Airline for about two years. I have taken the flights three times.
A. is open B. has opened
C. has been open D. has been opened
4.C
4.C
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题目内容
() 4. The Dongying-Hainan Airline for about two years. I have taken the flights three times.
A. is open B. has opened
C. has been open D. has been opened
4.C