As part of a student social survey project, you are leading a group to visit an exhibition in a small town. Write a letter: 1)ask for information regarding such things as the contents of the exhibition, 2)the dates of its opening and closing, any discounts. You should write about 100 words on the ANSWER SHEET. Do not sign your own name at the end of the letter. Use 'Zhang Wei 'instead. Do not write your address.