用一句话概括下面这则新闻的主要内容，不超过20个字。

    杭州的建筑工地每年有1 000多个，如果把这些工地的围墙适当“美容”一下，它将成为街头一道独特的风景。为进一步打造“国内最清洁城市”，今后，杭州新开工的建筑工地的围墙都要美化。

现在不少城市的墙绘主要是广告，而杭州的墙绘则比较有江南特色，有些还融入了地域文化。有关部门要求杭州建筑工地的墙绘今后消除盈利性广告，逐步走向公益化，赋予其丰富的文化内涵，体现出杭州的文化特质。

(只)

在同一平面直角坐标系中，同一水平线上开口最大的抛物线是（　　）

短文填空
    One day, a poor boy was selling goods from door to door to pay for his tuition fees (学费). He was hungry. He d____he would ask for a meal at the next house. However, he lost heart w____ a lovely young woman opened the door. He asked for a drink of water and the woman agreed. She thought he looked hungry, so she b____ him a large glass of milk. He drank it slowly, and then asked, “How much do I owe (欠) you ?”“You owe me nothing, ” she r____ . “Mother has taught us never to accept pay for a kindness.”He said, “Then I thank you from my heart.”
    Years later, that young woman become seriously i____.The local doctors all f____  to cure her. They finally sent her to the big city, where they called in specialists (专家) to study her rare disease. Dr. Howard, who o____ got a large glass of milk and a meal from the young woman, was called in for the treatment. He went down the hall of the hospital to her room when he heard the name of the town she came from. D____  in his doctor’s uniform, he went in to see her. He recognized (认出) her quickly. He made up his mind to do his best to save her life and pay special a____ to the case. After a long struggle, the battle (战役) was won. The woman n____  these words when she paid the pill: “ Paid in full with one glass of milk… Dr. Howard Kelly..”