Dear Max,

    Your mother and I don't yet have the words to describe the hope you give us for the future. We believe all lives have equal value, and that includes the many more people who will live in future generations than live today. Our society has an obligation to invest now to improve the lives of all those coming into this world, not just those already here.

    Our hopes for your generation focus on two ideas: advancing human potential and promoting equality.

    Today your mother and I are committing to spend our lives doing our small part to help solve these challenges. I will continue to serve as Facebook's CEO for many, many years to come, but these issues are too important to wait until you or we are older to begin this work. By starting at a young age, we hope to see compounding benefits throughout our lives.

    As you begin the next generation of the Chan Zuckerberg family, we also begin the Chan Zuckerberg Initiative to join people across the world to advance human potential and promote equality for all children in the next generation. Our initial areas of focus will be personalized learning, curing disease, connecting people and building strong communities. Over short periods of five or ten years, it may not seem like we're making much of a difference. But over the long term, seeds planted now will grow, and one day, you or your children will see what we can only  imagine.

    We will give 99% of our Facebook shares --currently about $45 billion -- during our lives to advance this mission. We know this is a small contribution compared to all the resources and talents of those already working on these issues. But we want to do what we can, working alongside many others.

(1) From the passage we can learn that the author is Max's ________.
A. mother B. father C. brother D. grandparent
(2) Planted seeds referred in the 4th paragraph are to explain that ________.
A. it is better doing something to improve the world than waiting B. harvest can be expected after sowing C. it makes little difference to help solve the challenges D. it takes time to show their effort works
(3) The underlined word “obligation” most probably means ________.
A. duty B. effort C. contribution D. ability
(4) Through the letter, the author mainly wants to tell Max ________.
A. he decides to donate 99% of the Facebook shares to help improve the world B. he will serve as the Facebook's CEO for many years for her better living C. he is devoting himself to help realize the equality of the human D. he is contributed to helpimg make a better world for her and her generation