Years ago, if a teenager had some problems in his life, he might write them in his diary. Now a teenager w{#blank#}1{#/blank#} the same problems might get on the Internet and write them in his blog. In many ways, a diary and a blog are almost the same. So, what makes a blog d{#blank#}2{#/blank#} from a diary?

    The biggest difference is that a blog is much more public t{#blank#}3{#/blank#} a diary. Usually, a teenager likes hiding his diary book and treats it as one full of s{#blank#}4{#/blank#}. Both diaries and blogs tell what happened to the writer that day.

    A blog has both good and bad points (特点). The biggest problem is that anyone can read what you write in your blog. If you are not satisfied with a friend during school and write something bad about him in your diary, he will never know it. H{#blank#}5{#/blank#}, if you do this on the Internet, that friend may read your blog and get a{#blank#}6{#/blank#}. So we have to be careful of what we write.

    A blog has good points, of course. People choose to write in blogs, they know that their friends will read what they write. If you are f{#blank#}7{#/blank#} sad one day and write in your diary, no one will know about it. If you write the same words in your blog, your friends may quickly w{#blank#}8{#/blank#} back to comfort you or offer you help. Blogs help people stay in close contact and let them know what their friends are doing.

T{#blank#}9{#/blank#} it's a good way to write blogs about everyday life, I still p{#blank#}10{#/blank#} my old diary.

    Today we can see that many people are cutting down the trees in the forests. A lot of rich land has become deserts. If we {#blank#}1{#/blank#}（read）newspapers, we'll learn that the forests on the earth are getting smaller and smaller all the time. We are {#blank#}2{#/blank#} (cut) down large numbers of trees because we need wood and farmland. In many {#blank#}3{#/blank#} (place), the new farmland will soon look like the old deserts. Some scientists say that there will not be any great forests in 20 or 30 years.

    It's our duty {#blank#}4{#/blank#} (protect) the forests well. Everyone should try his best to make a contribution to {#blank#}5{#/blank#} (take) care of the forests.

    Many people like animals and take them as their pets, so pet hospitals are usually very busy. Kind persons {#blank#}1{#/blank#} love animals are needed to help in busy animal hospitals. Vets (兽医) will teach them {#blank#}2{#/blank#} to take care of the animals.

    Scientists think that pets will {#blank#}3{#/blank#} (probable) be much smaller {#blank#}4{#/blank#} people in the future will live in much smaller space. Scientists are now working on making very small farm animals, and the same thing might be done to make small cats and dogs.

    It {#blank#}5{#/blank#} (be) said that some day you might own a panther (豹) as a pet. Some scientists believe that they might have to start turning wild animals into pets, since this might be the only way to save them from {#blank#}6{#/blank#} (die) out.

    What about taking a robot as a pet? This may sound strange, {#blank#}7{#/blank#} it could become true. Robot dogs have been made {#blank#}8{#/blank#} (sell). They are like real dogs. These pets might become more and more popular in the future.

    Lots of people miss their pets when they are {#blank#}9{#/blank#} holiday. One hotel in Minnesota has solved this problem. It lends cats to their guests. Many expels believe more and more people will like this idea. It is very possible that in the future you will be able to order a pet, as well as room service, at {#blank#}10{#/blank#} hotel.