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Choose one word or phrase that best completes the sentences. 1. He urged donors to ________ their efforts to send aid to Somalia. A. step on B. step up C. step off D. step down 2. It is surprising that it has taken people so long to _________what is a win-win opportunity. A. take advantage of B. have advantage over C. work to advantage D. turn to advantage 3. The shop _________ everything from cigarettes to recycled loo pape r. A. collects B. gathers C. accumulates D. stocks