下列关于地球形状的描述，正确的是（　　）

    AMERICA'S first daughters, Malia and Sasha, are excited about getting a pet dog. But their father, President Obama, has told the girls they have to pick up the poop(狗粪)1the grass. It's true. Keeping a dog  2 lots of other work besides(除…之外) picking up the poop. For example, you'd better know3the dog goes to bed and how it lives happily. It means you have to know the animals'4 and be ready.

    Li Hui, 15, of Beijing, once kept a rabbit and some goldfish.5 all of them died. "My rabbit ate the wrong food," said Li. "My6 died because they ate too much!"

    Xiao Ting, 15, of Shanghai, wanted to keep a dog a year ago. She got food and a new doghouse ready to 7 the dog, but she only kept the dog for one day. "I 8 thought a dog could be so active. It wouldn't stop barking(吠). My father had to walk9 at 3 o'clock in the morning!"

    "You'd better think it is like your10." said Liu Yining, a11 Beijinger. She is a (an)12 pet keeper. Her family has kept a dog named Pipi for three years.13 Pipi first came to Liu's home, it made her house dirty everywhere. It took a long time to teach Pipi to go to the toilet. She talks and plays with Pipi a lot. She really 14Pipi.

    15 a pet means you have to be patient and caring.

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1). 每处错误及其修改均仅限一词；

2). 只允许修改10处，多者（从第11处起）不计分。

    The students union will organize an activity when we can exchange items we don't need with others. If you are interested it, you can join on Saturday afternoon on the Central Road in our school. As it is known to all, many of us have difficulty deal with used things that mean little to us. If you take it there, not only can you get anything you want, but you can also help others. Beside, it will be a good chance to communicate and make new friend. Any used items is welcome, such as used books, shoes, watches and so on. The more, the good.