假定英语课上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，每句中最多有两处。每处错误仅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。

Dear Sir/Madam,

    I'm one of your customer. I ordered a set of books on your website two weeks ago, but I didn't received it until yesterday. And much to my disappointment, the books were too poorly packed up that the cover of one book were torn. To make matters worse, it is not a complete set, as I found one book missed.

    I'm sorry to have received such poorly service, and I believe I have every right ask you to deal with this problem. I hope you either return my money back or deliver a new set of books to me. Beside, I'd like to be informed of the process of your deal with my complaint.

    I'm looking forward to your reply.

Li Hua

    The booking notes of the play “The Age of Innocence”:

    Price: $10

    DISCOUNTS;

    Saver: $2 off any seat booked any time in advance for performances from Monday to Thursday. Savers are available for children under 16, over 60s and full-time students.

    Supersaver: Half-price seats are available for people with disabilities and one companion. It is advisable to book in advance. There is a maximum of eight wheelchair spaces available and one wheelchair space will be held until an hour before the show.

    Standby: Best available seats are on sale for $6 from one hour before the performance for people eligible (suitable) for Saver and Supersaver discounts and thirty minutes before for all other customers.

    Group Bookings: There is a ten percent discount for parties of twelve or more.

    School: School parties of ten or more can book $6 standby tickets in advance and will get every tenth ticket free.

    Please note: We are unable to exchange tickets or refund (退款) money unless a performance is cancel led due to unforeseen circumstances.

BOOKING:

    There are four easy ways to book seats for performance:

    In person: The Box Office is open Monday to Saturday, 10a. m.- 8pm.

    By telephone: Ring 01324976 to reserve your tickets or to pay by credit card (Visa, MasterCard and Amex accepted).

    By post: Simply complete the booking form and return it to Global Theatre Box Office.

    On line: Complete the on-line booking form at www. Satan fiedtheatre. com.

中国城市的发展经历了有城无市、城中有市、城区即市区、城在市中、有市无城五个发展阶段。其中“城区即市区”普遍开始出现于哪一时期？（    ）