根据句意和汉语注释,写出单词的正确形式。 1. She has struggled ________ (反对) cancer for almost ten years. 2. Remember to hold your ________ (呼吸) when you dive into the water. 3. He ________ (证明) his courage in the battle. 4. I'd rather stay at home to watch the ________ (实况转播) boxing match. 5. He must have taken the book ________ (既然, 由于) it isn't here any more.