按要求完成句子 1. 我从未读过这么好的书. I _____ _____ _____ such a good book. 2. I have fed the cat already.(改为一般疑问句) _____ you _____ the cat _____? 3. He has cleaned out the refrigerator already(改为否定句) He _____ _____ _____ the refrigerator yet. 4.We have been friends for 3 years.(对划线部分提问) _____ _____ _____ you _____ friends?