根据Text A总结文章大意并完成填空。 Never, ever give up!      When invited to address the patriotic young boys at his old school, Harrow, Britain’s great Prime Minister, Sir Winston Churchill gave this short, clear-cut speech: “Young men, _____1______. Never give up! Never give up! __________2___________!”       Personal history, ___________3________, individual dilemmas – none of these can ___4__ a strong spirit committed to success. Take Albert Einstein, Thomas Edison and Abraham Lincoln as an example. Despite the immense obstacles and extreme criticism, their strong will, ___5_____, dedication and determination enabled them to ____6_______ the overwhelming failures and profound difficulties in their lives.         Many artists, statesmen, writers and inventors achieved prosperity because they possessed a _______7_________to keep preparing and working and a passion to succeed.       Many people simply say that they want something, but they do not ___________8______________ required to achieve it. Many people let the threat of failure stop them from trying with all of their heart.          The secret of success is based upon a burning inward desire that __9___ the determination to act, to keep preparing, to keep going even when _______10_________. Focus on becoming more knowledgeable. Focus on ___________11______________. Maintain the strong will to keep going. With hard work, determination, dedication and preparation, you can _____________12________, _________13___________, and achieve success!