句型改写 根据所给单词、词组或题目指示改写下列句子。 1. It is not so bad that we can do nothing about the situation. (never too...to...) 2. Sandy promised to marry John on condition that she won the approval of her father. (as long as) 3. No one is so old that he can not learn. (never too...to...) 4. On condition that you set a goal, you will get somewhere someday. (as long as) 5. It is so late that you cannot put a stop to this madness. (never too...to...)