Last year, I had a chance to be {#blank#}1{#/blank#} exchange student. I went to the USA. It was the  {#blank#}2{#/blank#} (one) time for me to be there. I was {#blank#}3{#/blank#} (excite), because I had never gone abroad. When I arrived in America, I stayed with a host family. At first, I was {#blank#}4{#/blank#} nervous that I could hardly speak a word. But my host parents were very kind to me and helped me to be relaxed. Gradually, I managed {#blank#}5{#/blank#} (understand) them and my friends. Soon I got used to {#blank#}6{#/blank#} (live) in the USA. Now I can speak English {#blank#}7{#/blank#} (good) than before. Sometimes I still share my ideas {#blank#}8{#/blank#} my friends in America. I really enjoy my experience as an exchange student. It's exciting to 1ive in a country with {#blank#}9{#/blank#} (difference) culture. I hope that I will have more {#blank#}10{#/blank#} (chance) to go abroad.

    "Dreams (梦 ) may be more important than sleep. We all need to dream，" some scientists say.

    Dreams take up about one quarter of our {#blank#}1{#/blank#}(sleep) time. People have several dreams each night. Dreams are {#blank#}2{#/blank#} short films. They are usually in color. Some dreams are like old films. They come to us over {#blank#}3{#/blank#} over again. That may be because the dreamer is {#blank#}4{#/blank#}(worry) about something. Dreaming may be a way of trying to find an answer.

    Some people get new ideas about their work {#blank#}5{#/blank#} dreams. They may have been thinking about their work all day. These {#blank#}6{#/blank#}(think) can carry over into dreams.

    Sometimes, we wake up with a good {#blank#}7{#/blank#}(feel) from a dream. But often we can't remember the dream. Dreams can disappear (消失) {#blank#}8{#/blank#}(quick) from memory (记忆).

    Too much dreaming can be harmful (有害的). The {#blank#}9{#/blank#}(much) we sleep， the longer we dream. The mind is hard at work when we dream. That is {#blank#}10{#/blank#} we may have a long sleep and still wake up tired.