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Efforts to construct the sprawling $1 billion Hanthawaddy airport — the second international hub for the main city of Yangon— have been on again-off again for almost two decades.
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(Korea's Incheon wins tender for Myanmar airport - Money - MSN CA)
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.