—P-U-R-P-L-E.

    I was very happy that I had done well in the final exams last semester. But as mid-term exams were around the corner, I started to become w{#blank#}1{#/blank#}because I was not sure whether I could make progress or not.

    Since My mother is also my history teacher, I always think I am a little embarrassed(尴尬的). I have grown up watched by teachers of other subjects. This means I am always under a lot of pressure. I always feel that if I fall behind others, people will think badly of me. I started to force myself to stay up later and study harder than others, but soon I became tired.

    Luckily, my head teacher noticed I was behaving u{#blank#}2{#/blank#}. He decided to try and help me. One morning, I was reading outside the classroom. He came along and said with a smile: "Peter, i{#blank#}3{#/blank#}your scores by staying up late isn't a life-long solution. You have to think of other w{#blank#}4{#/blank#}to develop your efficiency(效率) in a short time."

I looked at him and nodded.

    "You are not a machine or a robot. You need rest," he continued. "When you are studying, focus on n{#blank#}5{#/blank#}but studying. But when it comes to rest, think of having a good rest only! Don't pay so much attention to your rank in the class, and you will find that studying is simple and f{#blank#}6{#/blank#}.

    I listened carefully and began to understand what he was saying. Study and rest are not like water and fire, two things that cannot be m{#blank#}7{#/blank#}. Instead, study is like a chemical reaction(反应)，and having a rest is like a catalyst( 催化剂) that makes reaction violently.