Frank.P

1.
        But seven years ago, he made a startling and disturbing discovery: Her grandfather was a notorious NAZI commander who ran a concentration camp where thousands of people were put to death.
2.
        你的大纲需要流畅的连接各个观点，但是不要误导你自己。
3.1
                The most regret is the person can't both had youth and felt of youth.

Christine

1. ✔；2. 大致正确。参考答案：你的写作提纲应该指引你从一个点自然过渡到下一个点，但却不束缚你的思路。3. 参考答案：The greatest regret of life is that a person can't have youth and experience of youth both at the same time.注意is后面带从句要that引导，can't+v.原型。