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Is oxygen the only gas _______ helps fire burn?

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John got beaten in the game, _______ had been expected.

Visiting the Great Wall is necessary for visitors form both home and foreign countries______ come to Beijing the first time.

We attended the meeting in the school lecture hall last night,____ seats more than 300 students.

It's a given fact that life is hard but whatever difficulties occur, those_____ belief is stronger are more likely to overcome them successfully.