阅读下面短文并回答问题，然后将答案写到答题卡相应的位置上（请注意问题后的词数要求）。
[1] My high school, like many others, was extremely competitive not only in sports but also in academic subjects. The pressure of trying to get excellent grades while joining in extra-curricular activities could be great. Sometimes it seemed like I lived at school! When I was at home my time was spent doing homework. Some days I was so busy finishing a project that I could hardly see my families.
[2] I have a brother and a sister named Sally. She was nine years old. We used to see each other, but after I graduated from the primary school she attended, I saw her less and less. I tried to go to her gymnastic meets and soccer games, but I had my own play rehearsals（排练）and meetings.
[3] Then one day I came home, an empty house and I found a note from my mom. She was at my brother’s baseball game. However my sister was at her friend’s, and would be dropped off.
[4] At five o’clock I went to turn on the light on the front porch and saw my sister walking towards the door with her friend and her friend’s father. I heard them talking.
[5] “Is anyone at home?” the father asked.
[6] “Just my mean elder sister, Sara, and she’s probably in her room as usual,” my sister replied. I couldn’t believe it. I didn’t even know who this man and my sister was making me sound like one of Cinderella’s wicked (可恶的)stepsisters. I opened the door, thanked the father for _______________, then shut the door and started to cry.
[7] To make a long story short, a huge fight followed that ended with me driving my sister to her room. But I realized that what was worse than the fight was that I really hadn’t been a good elder sister.
[8] I had lost track （路线，方向）of what was important, and what really mattered. I had been fallen into a whirlpool（漩涡）of pressure and competition, and it took my sister’s honest observation to show me that the grades I got didn’t matter to everyone---certainly not to her. All that matters to her is that I’m her elder sister, and that’s what matters to me, too.
What is the main idea of Paragraph 1?  ( no more than 10 words )
Fill in the blank in Paragraph 6 with proper words. ( no more than 5 words )
Explain the underlined sentence in Paragraph 3.
How did Sally think of her sister?  ( no more than 10 words )
What lesson did Sara learn from her sister in the last paragraph? ( no more than 10 words )