题目内容

Peace talks work _____ the warring forces are prepared to compromise.

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His invention has helped to save thousands, _____ millions, of dollars for the company.

Application for the scholarship will be considered _____ they are submitted by the end of March.

A one-to-one professional training was absolutely necessary, _____ for a couple of hours.

_____ your new job doesn't work out? Are you going to quit again?

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