对某一害虫成灾区先后使用两种杀虫剂处理，实验结果如图所示．请据图回答：

    I was 8 years old when I found out my father was ill. It was 1993, but I can remember my mother's words as if it were yesterday. “Jessica, I don't want you to take food from your father, because he has AIDS. Be very careful when you are around him.”

    AIDS wasn't something we talked about in my country when I was growing up. From then on, I knew that this would be a family secret. My parents were not together anymore, and my dad lived alone. For a while, he could take care of himself. But when I was 11, his condition worsened. My father's other children lived far away, so it fell to me to look after him.

    We couldn't afford all the necessary medication for him, and because Dad was unable to work. I had no money for school supplies and often couldn't even buy food for dinner. I would sit in class feeling completely lost, the teacher's words muffled as I was thinking how I was going to manage.

    I didn't share my burden (负担) with anyone. I had seen how people reacted to AIDS. Kids laughed at classmates who had parents with the disease. And even adults could be cruel. When my father was moved to the hospital, the nurses would leave his food on the bedside even though he was too weak to feed himself.

    I had known that he was going to die. But after so many years of keeping his condition a secret, I was completely unprepared when he reached his final days. Sad and hopeless, I called a woman at the nonprofit (非营利的) National AIDS Support. That day, she kept me on the phone for hours. I was so lucky to find someone who cared. She saved my life.

    I was 14 when my father died. He took his secret away with him, having never spoken about AIDS to anyone, even me. He didn't want to call attention to AIDS. I do.

语法填空

    Learning any language ____(take) practice － lots of practice! Often, it's difficult to know ____ you should practice it. Should you watch a video? Perhaps,____ would be a good idea to do a few quizzes. Of course, you should try to speak English with your friends. All of these are great ideas, but it's also important to build a routine. A routine will help you make ____ (study) English a habit. That's the best way to improve your English!

    It's important to ____ (expose) to many different areas every day.____, you shouldn't try to study too many ____ (differ) subjects. These suggestions take a 30-minute listening and reading as the basis for daily practice. You are trying to learn many new things, so don't try to learn too much in any one area too ____ (quick)! 

    Take 5 minutes to write down all the new words you find in your listening and reading exercises. Keep a notebook, and write in the ____ (translate) in your native language. Don't forget to learn grammar for 10 minutes. Try to quickly summarize what you listened to and what you read and speak out loud.

    That's it! Approximately 45 minutes a day, every day or at least four times a week! If you continue to do this, you will be ____ (surprise) at how quickly your English improves!