We can't stop an earthquake，but we can do things to make sure they don't destroy (毁坏) whole cities. First，it is not a {#blank#}1{#/blank#}idea to build houses along lines where {#blank#}2{#/blank#}of the earth's plates (板块) join together. Second，if you think there {#blank#}3{#/blank#}be an earthquake，it is better to build houses on rocks， not on {#blank#}4{#/blank#}Third， you must make the houses as {#blank#}5{#/blank#}as possible. Weak buildings will {#blank#}6{#/blank#}down in an earthquake，but strong ones may stay up.

    Scientists are {#blank#}7{#/blank#}that one day an even bigger earthquake will hit the part around San Francisco. They call it “The Big One”. However，people today are still building more {#blank#}8{#/blank#}The population in and around San Francisco is {#blank#}9{#/blank#}ten times more than it was in 1906. This means that {#blank#}10{#/blank#}there is another earthquake，a great many houses and buildings will be destroyed.

    Welcome to the most friendly museum in London. In most museums, there is no shouting and no running, and you must not touch anything. {#blank#}1{#/blank#}It is noisy! People talk about what they can see and do here, and there are some very noisy machines as well. If you want answers to all your questions about science, this is the right place for you.

    {#blank#}2{#/blank#} You can learn about communications and the environment as well as math, physics and chemistry. For example, you can find out how people dig coal (煤) from the ground and use it to create energy. And in one room they even explain how X-rays let you see inside your body.

    The Launchpad on the third floor is the most popular room. {#blank#}3{#/blank#} For example, if you want to fill a bag with sand, you have to control a kind of truck (卡车) on wheels and move it into the correct place. You can also find out how people travel into space and back again.

    Now, we arrive at the fourth and fifth floors. {#blank#}4{#/blank#} If you compare the medicine of the past with the medicine of today, you will feel very lucky next time you visit a doctor.

The Science Museum is interesting for people of all ages. You can always find something new and have a wonderful time there. The museum is free to enter. {#blank#}5{#/blank#} It is open daily from 10 a.m. to 6 p.m. So if you ever go to London, make sure you visit the Science Museum. It is my favorite museum in the whole world.

Marie: Hi, Carla. What are you doing?

Carla: I am writing a card for my teacher.

Marie: Sounds interesting. Which teachers will you miss the {#blank#}1{#/blank#}after Junior high school, then?

Caria: Mmm, I think Ms. Li and Mr. Cai.

Marie: I know Ms. Li was very {#blank#}2{#/blank#}with you in the math class. She helped you work out the answers with some proper {#blank#}3{#/blank#}no matter how difficult the problems were.

Carla: Exactly, and Mr. Cai, our science teacher, guided me to do a lot better in science than before. He always spent time explaining things to me {#blank#}4{#/blank#}whenever I was in trouble. Who will you miss?

Marie: I will miss my English teacher, Ms. Criffin She {#blank#}5{#/blank#}me to speak English loudly in class. And she often encouraged tile," You can do it!" Because of her, I put in more effort and won the first prize in an English contest.

Carla: Well, shall we get each of them a card and a gift to say thank you?

Marie: It couldn't be a better idea. Let's do it right now!