strengthen

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strengthen

1.The large profits earned from cash cows are used for（）on management to strengthen the future prospects.2.When you are used to reading, reading can strengthen your attention span.3.（）decided to move the capital to Beijing in order to strengthen the Northern frontier.4.Recent events have helped to strengthen the （）between our two countries.5.Visual aids enhance a presentation and make it memorable if they are used properly to strengthen understanding.6.China has always taken it as the basis of its foreign policy to strengthen unity and cooperation with developing countries.7.Quotations from authorities can strengthen an argument. And you can use this terms: ( )