Complete the sentences by putting in the blanks appropriate if idoms. (if only, only if, if not, what if)At the beginning a lot of people thought his dreams were quite difficult, _____ impossible, to realize. But eventually he made it.
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Peace talks work _____ the warring forces are prepared to compromise.
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.