题目内容：

US president Barack Obama is probably 1.______ most powerful person in the world. But what was his high school life 2._______? You can find answers to the question in his “Back to School” speech 3.______ (give) on September 13, 2010.

“I know some of you may be nervous about starting a new school year and worried about 4._______ that’ll be like. Here is what I tell you: nobody 5._____ (get) to write your destiny (命运) but you. Your future is in your hands. Your life is what you make of it. And nothing is beyond your reach. So long as you’re willing to dream big. So long as you’re willing to work hard. So long as you’re willing to stay 6._____ (focus) on your education. An education has never been more important. I’m sure there will be times 7._____ you’re staying up late for a test, or dragging (费力地拉起) yourselves out of bed on a rainy morning, and wondering 8._____ it’s all worth it. Let me tell you: Nothing is as 9._____ in life as your education. In other 10.______ (word), the farther you go in school, the farther you’ll go in life.

 

An unforgettable experience I recently had made me 11.______ (see) how important friendships are and the need to have a better understanding of friends. A friend is a person 12.______ is always there to encourage and support you whenever you’re in trouble. A friend is a person who’ll try to do what he or she can13.______ you. A friend is a person who’s overjoyed seeing you win and who will share your sorrow when you’re 14.________ (disappoint).

    For my part, friendship is like a 15.______(price) gift: It can’t be bought for any amount. It’s also a shining light of hope. If you have friendship, you’ll never feel16._______(alone).

 

Exactly 10 years ago, 189 heads of state 17.______ (gather) in New York. They set a number of goals. These goals included helping poor people, educating children and protecting the environment. The leaders agreed to do their best to meet the goals 18._______ 2015.

    With only five years 19._______ (go), about 140 world leaders got together in New York on September 20. Their20.________ (三天的)meeting was to talk about their work on the goals.