Where {#blank#}1{#/blank#}  the animals from?
 It's eight o'clock now.. The students{#blank#}2{#/blank#}  an English class.
Our teacher is very {#blank#}3{#/blank#}  to us. We all like her very much.
 There are many beautiful{#blank#}4{#/blank#}  in Hainan.
 Go{#blank#}5{#/blank#} on, and you can find the library on your left.

Dear Han Mei,

      Thank you for your letter. I  {#blank#}1{#/blank#}  China very much. And I  {#blank#}2{#/blank#}  to go to China with my parents. We want {#blank#}3{#/blank#} Beijing. I know something {#blank#}4{#/blank#} China from your letters. {#blank#}5{#/blank#}. I don't know much about Chinese food. Could you tell    {#blank#}6{#/blank#} something about it?
I like  {#blank#}7{#/blank#}  and fish very much. You tell me you {#blank#}8{#/blank#} eat rice, vegetables and chicken.   And your {#blank#}9{#/blank#}  food is jioazi. What kind of food   {#blank#}10{#/blank#}  drink can I have in China? Please tell me.

    Lisa and Alice are good {#blank#}1{#/blank#}. They go to a children's hospital today. They want to help the children to be happy. Lisa {#blank#}2{#/blank#} reading. So she tells {#blank#}3{#/blank#} to them. Alice likes singing and {#blank#}4{#/blank#}. She sings some English songs for the children. They go home late, but they are very {#blank#}5{#/blank#}.

    Although we still don't know whether using mobile phones can cause cancer, we should try to use our phones {#blank#}1{#/blank#}.Here are some tips:

    *Use a headset（耳机） or speaker.

    Headsets give out much less radiation than phones.Some wireless headsets give out low-level radiation. However, you should {#blank#}2{#/blank#} your headset when you're not talking to anyone.Using a phone with a speaker will also make it safer.

    *Listen more, talk less. Your phone gives out radiation when you talk or text, but not when you're listening or getting messages.

    *Hold the phone away from your body when you are talking, not {#blank#}3{#/blank#} your ear. Also, don't keep it in your pocket.

    *Choosing texting over talking. Phones give out less radiation when sending texts than when making calls.Texting also keeps radiation away from your head.

    * Poor signal? Stay off the phone. Fewer signal bars（信号数） on your phone {#blank#}4{#/blank#} that the phone needs to give out more radiation to work. Make and take calls [when your phone has a strong signal.

A Cloud of Hope and Danger

    In 2050, a small cloud floats through the air in a hospital operating room(手术室). In the room a patient, suffering from cancer, lies on a table. The cloud surrounds (包围) the patient, {#blank#}1{#/blank#}her body and filling her lungs (肺). The cloud is not smoke or steam. It is made of millions of microscopic robots called nano-robots(纳米机器人). These tiny robots move from cell(细胞) to cell in the {#blank#}2{#/blank#}body, destroying the cancer cells.

    Fighting cancer with nano-robots is only an idea today, {#blank#}3{#/blank#}scientists say that it would be possible in the future. Using nano-robots for good purposes such as fighting disease or repairing the environment may be the {#blank#}4{#/blank#}to many of today's problems.

    However, nano-robots could be a {#blank#}5{#/blank#}risk as well. Since nano-robots are so tiny, they will have to work in large teams of many thousands to 'many millions. For this reason, nano robots will have to be programmed to build {#blank#}6{#/blank#}. Scientists will not have the ability to build millions of nano-robots one by one.

    This {#blank#}7{#/blank#}to reproduce(复制)is making some scientists worried. What if something goes wrong in the programming? Quite a lot of crazy nan-orobots would be far {#blank#}8{#/blank#}than any disease. Some people think that if they get out of control, nan-orobots could destroy the Earth.

    What should be done? Should we continue{#blank#}9{#/blank#}nan-orobots or should we search for other methods? This is one of the many difficult {#blank#}10{#/blank#}that we have to make in the future.