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题型：单选题题类：模拟题难易度：普通

The Dongying-Hainan airline for about 5 months. I have taken the flights three times.

A、is open B、has opened C、has been open D、has been opened

举一反三

I ____ Mr. Smith since he moved to Shanghai.

——How long have you _ Teresa?
——For three years by now. Our wedding anniversary is coming next week. .

Miss Lin __________ a lot of work for the poor area since 2010.

—Oh, Mrs King, your necklace looks nice. Is it new?

—No, I _______ it for 2 years.

Jim has kept me{#blank#}1{#/blank#}(wait) for two hours.

Erie____many things since he became interested in science.

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