Nowadays, WeChat is becoming more and more{#blank#}1{#/blank#} with people in China. No matter where we are, we can sign up and send text or voice messages to our friends. We can also find strangers to talk to by {#blank#}2{#/blank#}(shake) the phones.{#blank#}3{#/blank#} [ə'nʌðə] funny function(功能) is that WeChat can help to search for people{#blank#}4{#/blank#}live nearby with the program on. Many people like this function, because it can help them to find more people who they may know.

    In my opinion, Wechat is really a {#blank#}5{#/blank#}(use) chatting tool. It can help people communicate with their friends more {#blank#}6{#/blank#}(easy). However, it is also bad for people, especially students. As we know, some people use Wechat{#blank#}7{#/blank#}a long time. It is not healthy to them. So I have some {#blank#}8{#/blank#}[sə'dʒestʃənz] to use it in a correct way. First, we should not use it when we are studying. We can't focus on our study if we use it. Second, we must be careful. We should {#blank#}9{#/blank#} show too much personal information nor trust strangers so much.

    We should learn {#blank#}10{#/blank#} to use it properly. Remember, Wechat is not everything in our life. Don't depend too much on it.

W: I'm really excited {#blank#}1{#/blank#}seeing the famous paintings by Picasso.

M: Me, too! I'm glad Mr. Smith could{#blank#}2{#/blank#}the art museum for our school trip this year.

W: I still remember last school trip in October when we went hiking. It began to rain {#blank#}3{#/blank#}soon after we had started off.

M: Yeah, it was so terrible.

W: This time I'm going to bring my new {#blank#}4{#/blank#}to take lots of photos.

M: Oh, no. Mr. Smith says we must not take photos. It's not {#blank#}5{#/blank#}in the museum

W: That's too bad! Do you think we may be allowed to take photos if we don't use a flash?

M: I think they just want to protect the paintings. If you don't use a flash, then it may be OK.

W: Yeah, you are right. I'll bring my camera anyway

    The post office has plenty of work to do. It deals with thousands of letters every day. Let's follow a letter all the way across America.

    Julie lives in New York. She wrote a letter to Dave in Oregon. Julie put the letter in the mailbox on Monday night. On Tuesday morning, a truck {#blank#}1{#/blank#} at the mailbox. The postman put the letters into a large bag and took the bag to a post office in New York.

    On Tuesday afternoon the letters were sorted(分类) . Post codes were used to sort the mail. A machine {#blank#}2{#/blank#} a letter and held it. A worker read the post code.

Then the worker pushed five buttons on another machine in one second. After that, the machine put the letter in a box. By Tuesday night the box was on a truck. The truck went to the airport. An airplane {#blank#}3{#/blank#} for Oregon on Wednesday morning.

    Julie's letter went on the airplane.

    By noon the letters were in an airport in Oregon. Mail trucks then took them to post offices. One of these was in Dave's town. On Wednesday night people in Dave's town sorted the letters by street {#blank#}4{#/blank#}.

    On Tuesday morning the postman for Main Street picked up his pile of letters.

    He sorted all of them by street number before {#blank#}5{#/blank#}. The people at 1 Main Street got their mail first. Dave lived at 221 Main Street. He got his letter before lunch.