Dear Mr. Lee,
    I'm sorry to tell you that my grandmother is ill. She {#blank#}1{#/blank#} day and night. My parents aren't at home now. They {#blank#}2{#/blank#}  to Beijing on business last week. My grandma can not look after {#blank#}3{#/blank#}. So I{#blank#}4{#/blank#} take care of her. May I{#blank#}5{#/blank#} two days leave?
Yours,
Yu Ting

Paul: Hey, Jenny, the subject for my school project is "Small invention that changed the world". Can you help me think of an invention?

Jenny: With {#blank#}1{#/blank#}! Let me think ... hmm ... I know! The zipper!

Paul: The zipper? Is it {#blank#}2{#/blank#} such a great invention?

Jenny: Think about how often it's used in our {#blank#}3{#/blank#} lives. You can see zippers on dresses, trousers, shoes, bags ... almost everywhere! I saw a website last week. The {#blank#}4{#/blank#} of different inventions were listed there. For example, it mentioned that the zipper was {#blank#}5{#/blank#} by Whitcomb Judson in 1893. But at that time, it wasn't used widely.

Paul: So when did it become popular?

Jenny: Around 1917.

    Many students aren't getting enough sleep at night, which means they end up feeling {#blank#}1{#/blank#} during class. Taking a nap (小睡) during the day may be a solution.

    According to Forbes, a nap can clear your mind, {#blank#}2{#/blank#} your energy and help you study even {#blank#}3{#/blank#}. But how long should a nap last? "The proper time should be between 10 and 30 {#blank#}4{#/blank#}," Peter Venn, a sleep expert said.

    Sleeping for a short time, such as five minutes or so, is not helpful. That's just not enough time {#blank#}5{#/blank#}.But if you sleep for a long time, you may wake up feeling uncomfortable.

    Hi, I'm Mr. Black. Black is {#blank#}1{#/blank#} my first name. It's my {#blank#}2{#/blank#} name. My first name {#blank#}3{#/blank#} Mike. I like black {#blank#}4{#/blank#} white. I like blue, {#blank#}5{#/blank#}. Can you {#blank#}6{#/blank#} my jacket? {#blank#}7{#/blank#} is blue. What's that? It's my {#blank#}8{#/blank#}. It's {#blank#}9{#/blank#}, too. My phone {#blank#}10{#/blank#} is 322-5678. You can call me.