1 . 请根据语境，用方框内短语的正确形式将句子补充完整，每个短语只用一次。

make a difference     look forward to     work out   rather than   go through       date back to             in shock       as if     turn to   be concerned about

1. The art of paper cutting in China ________the sixth century.
2. He still keeps positive after ________so many difficulties.
3. He prefers to do sports in the gym every weekend ________play computer games at home.
4. To make his dream come true, he keeps a healthy diet and ________regularly to be physically fit.
5. My kids are ________being taken to the zoo this weekend.
6. As a teacher, I am confident that I can ________to the lives of my students.
7. To avoid destroying the heritage, the government ________the United Nations for help in 1959.
8. She looked at her husband ________, waiting for him to explain what happened.
9. After the terrible earthquake, it seemed ________the world were coming to an end.
10. I ________the African elephants, so I wonder what you know about them.