A good teacher is many things to many people. In my own experience, the people I respect most are the teachers{#blank#}1{#/blank#}demanded the most discipline from their students.

    I miss one teacher in particular that I had in high school. I think she was a good teacher because she was a very strict person. I remember very {#blank#}2{#/blank#} (clear) a sign over her classroom door. It was {#blank#}3{#/blank#} simple sign that said, “Laboratory—in this room the first five letters of the word was emphasized, not the last seven. ” In other words, I guess, labor for her was more{#blank#}4{#/blank#} (importance), which means{#blank#}5{#/blank#} (make) speeches.

    She prepared her work very carefully and demanded us to do the same. We got lots of homework from her. Once she had broken {#blank#}6{#/blank#} (she) arm, and everybody in the class thought that maybe the homework {#blank#}7{#/blank#} (reduce), but it continued just the same. She checked our work by stamping her name at the bottom of the papers to show that she had read {#blank#}8{#/blank#}

    I think sometimes teachers who demand most are{#blank#}9{#/blank#}（like）least. But {#blank#}10{#/blank#}time goes by, this discipline really seems to benefit the students.

    Zac Sunderland is an American who was born in 1991. On July 16^th, 2009 Zac sailed (航行) back to Marina del Rey, California where he had left over a year before. As soon as he arrived, he {#blank#}1{#/blank#} (become) the youngest person in history to sail alone around the world. In order to get the amazing {#blank#}2{#/blank#} (achieve), Zac solved lots of problems.

    When something broke on his boat, {#blank#}3{#/blank#} (thousand) of miles out to sea, Zac had to repair it all by {#blank#}4{#/blank#} (he). Fresh food doesn't last long, so he got used to {#blank#}5{#/blank#} (eat) freeze-dried meals and canned food. And he felt lonely.

    Zac's experiences at sea were not all difficult or miserable(痛苦的). He got {#blank#}6{#/blank#}chances of seeing a night sky more shining than you have ever seen from land, watching {#blank#}7{#/blank#} (beauty) sunrises and sunsets and meeting different marine(海中的) life.

    Zac sailed alone but not non-stop. He made stops along the way {#blank#}8{#/blank#} (add) some more food and fuel. During those stops, he met people from different cultures. His father met him during many of his stops, took him out {#blank#}9{#/blank#} an excellent meal and helped repair the boat {#blank#}10{#/blank#} (frequent).

    Why do many of us find {#blank#}1{#/blank#} difficult or impossible to fall asleep in a bed other than our own? Is it because the bed is {#blank#}2{#/blank#} (comfort)? According to a new study published in Current Biology, a significant reason is {#blank#}3{#/blank#} the scientists call "first night effect". They believe that one side of the brain acts as a "night watch" to warn us about potential dangers. It forces us {#blank#}4{#/blank#} (stay) awake on the first night in a new environment.

    For the study, 35 young volunteers {#blank#}5{#/blank#} (ask) to sleep in a sleep lab for several days. Meanwhile, researchers watched their brain activities.

    According to the researchers, on their first night, the left brains were {#blank#}6{#/blank#} (active) than the right brains and people had a hard time sleeping. However, left-brain activity decreased as days went by, {#blank#}7{#/blank#} (fall) even to the point of complete calm. In this process, the participants got an increasingly better sleep experience.

    The {#blank#}8{#/blank#} (finding) suggest that the different rhythms of the sides of the brain affect our sleep. When the two sides work {#blank#}9{#/blank#} (different), the balance between them is broken. Thus, the brain can't relax and is sensitive to anything strange in the surroundings, just {#blank#}10{#/blank#} it is in the daytime.