短文改错

假定英语课上英语老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中至多有两处。错误涉及一个单词的增加、删除或修改。

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限一词。

2）. 只允许修改10处，多者（从第11处起）不计分。

    Last weekend's concert, organized and performing by the students of the Welsh Community College, was great success. The student had been practicing for months for the concert. They were excited that when they heard Gareth Jones was coming to present the prizes. Over 100 young performers play a mixture of jazz, classical or folk music. One of the highlights were 14-year-old Megan Evans, playing traditional Welsh folk songs. The concert ended with a very loud pop tune and anyone in the hall stood up and danced with the music. It was a magically atmosphere and a wonderful evening.

根据短文理解, 从A、B、C、D四个选项中选择最佳答案填空。

    When July comes, children know they'll have their exam and the school year will  1 soon. Boys and girls will have nearly a two-month holiday and they'll leave school  2 train or by car to  3 their parents.

    The summer holidays are the  4time of the year for most children. The weather is usually good. So children can spend most of their time   5  outside. If one lives in the countryside, he can go and play in the woods or in the fields. If he 6 in a big town, he can usually go to a park to play.

    The best place for children to spend their summer holidays is the  7 . Some children are lucky enough to live near the sea.   8 for those who don't live there, if they have the luck to stay in one of the big seaside towns for a week or two, they will  9   it all the following school year.

    Now,  10 makes children like the seaside so much? I think they are the sands, the sea and the sun. The feeling of sand under their feet, salt water on their skin, and the warm sun on their backs make them very happy.

“植物根尖细胞有丝分裂”的实验中，下列正确的实验步骤是（    ）