日本与美国均是世界上经济最发达国家之一，但是发展经济的条件却相差很大，图中a图是日本部分地理事物分布示意图，b图为美国部分地理事物分布示意图，读图回答下列问题．
生物体能由小长大是通过（ ）
I get up at 6: 50 every morning. Then I put on my clothes and shoes. And I eat my breakfast at 7: 20. I have milk, apple and bread for my breakfast. I go to school by bus. I arrive at school at 8: 00. Then I have my lesson at 8: 20. I go home at 5: 30 after school.
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Lucy tried her best ____ (pass) the math exam, but she still failed at last.
