（1）I {#blank#}1{#/blank#}my teeth three times yesterday.
（2）When I was a child, I {#blank#}2{#/blank#} to be a doctor.
（3）We {#blank#}3{#/blank#} our vacation last year. We stayed at a very nice hotel.
（4）Amy's grandfather{#blank#}4{#/blank#} when he was 90 years old.
（5）The concert {#blank#}5{#/blank#} at 7:30 and ended at 10:00.

    Next time you're in a public place, take a look-around you. And {#blank#}1{#/blank#}how many people are using their phones. I can tell you now that it is probably more than half, whether you're on a bus, in a care {#blank#}2{#/blank#}simply walking down the street.

    I'm not saying that I am not an example of this, but it {#blank#}3{#/blank#}mazes(使惊愕) me how people can spend so much time on their phones without {#blank#}4{#/blank#}to others. Has it gone too far?

    Recently, my smart phone broke and had to be {#blank#}5{#/blank#}off for repair for a week or so. I had to use a really old, basic phone just to keep me in touch with my family and {#blank#}6{#/blank#}. All I could do on this phone was to send text messages, make calls and play one game. And I loved it. I loved being  {#blank#}7{#/blank#}from the Internet, and I really didn't mind not having updates(更新) about what my friends were doing. It allowed {#blank#}8{#/blank#}to spend more time enjoying my time in London and watching the people {#blank#}9{#/blank#}me and really see what was going on.

    However, I knew that as soon as I got my smart phone back I would be one of those{#blank#}10{#/blank#}once again. Perhaps I should just go back to using the basic phone and forget I ever got my smart phone back.

    Until the early twentieth century, it was always unsuccessful to transfuse blood（输血） from one person to another person. Then in 1901, Karl Landsteiner, an Austrian scientist, discovered that there are four types of blood. These four blood types were named A, B, AB, and O. People have one of these four types. Blood type O is the most{#blank#}1{#/blank#} around the world because the number of the people with type O is the largest, while type AB is the least. If people with type A blood are given type B blood,  or people with type B blood are given type A blood,  they will{#blank#}2{#/blank#} die. Karl Landsteiner's research made it possible to be sure that people who need blood get the correct type.

    The study of blood didn't stop. In 1972, a Japanese doctor, Furukawa Takeji, {#blank#}3{#/blank#} another research about blood. And he came up with the idea that it was possible to tell one person's {#blank#}4{#/blank#}only by his blood type, which can help you know about the person quickly.

    Jack King

    I work in a TV station from Monday to Friday. My house is near a beautiful park and is about thirty kilometers from my office. I usually go to work by train. I usually get up at 6:30 a. m. and take the train at 7:00 a. m. It usually takes me about thirty minutes to get to my office. The train is quick and cheap. I am never late for work.

    Peter Green

    I am a student, My house is near a beautiful lake. My school is across from the lake. I can walk to school across a bridge. It takes me about thirty minutes. But I often go to school by boat, because it is more fun. It takes me about twenty minutes.

    Molly Smith

    I'm a waitress I work in a restaurant from Monday to Saturday. I often go to work by bus, It is about five kilometers from my house to the restaurant. It takes me twenty five minutes to go to work. Sometimes I am late for work because the traffic is very busy.