Conor Grennan was unwilling to be a volunteer(志愿者). The 29-year-old American was not sure

Conor Grennan was unwilling to be a volunteer(志愿者). The 29-year-old American was not sure if he had the skills or a strong feeling for it.
However, he went to work at an orphanage(孤儿院) in Nepal. His first thought was to make people impressed.
I thought that if I volunteered just once. I could retell the story over and over, Grennan said in a Huffington Post article.
However, his three-month stay it the orphanage turned into in unusual experience. It was 2004 and Grennan had given up his job to begin a year-long around-the-world trip, His first three months were spent in Nepal.
When he arrived in the village, he knew nothing about the children or the local culture. When he opened the gate of the Little Princes Children's Home, he was faced by the excited children.
The young American ended up caring for 18 children. He later discovered that they were trafficked(被拐卖的)children. So he walked through the mountains with great difficulty to find the kids' families, I started walking with photos of the kids. he told the Reuters reporter. I would show up in villages and show photographs around. I went with 24 photos, and I found 24 families.
At the same time, he put his heart into Nepalese culture.
Grennan said, “Volunteering is the single best way to see how the rest of the world lives.”
He also encouraged others to do what he had done. He believes that volunteering needs only making decisions to show up.
Grennan's fight against child-trafficking has changed him. His book, Little Prince, came out last week.
【小题1】At first, Grennan simply wanted to by volunteering in Nepal. A．write travel stories B．learn the skillsC．help the kids thereD．impress people【小题2】When Grennan came to the Little Princes Children’s Home. .A．18 children were ill in bedB．the children there felt excitedC．he decided to give up his job D．he’d lived in Nepal for a year【小题3】From the passage we can learn that Grennan .A．found the kids’ families easily B．was good at taking pictures C．wrote the book Little Princes D．asked others to go to Nepal【小题4】Which is the best title for the passage?A．Volunteer changes a lotB．Volunteer is with the kidsC．Volunteer becomes a writer D．Volunteer travels in NepalD

(答案→)D 解析：【主旨大意】本文讲述了美国年轻人康纳如何从不愿意参加志愿者活动，到热衷于与拐卖儿童作斗争不平凡的经历。【小题1】细节理解题。由文中的第二段中“His first thought was to make people impressed.”可知，起初他想给那里的人们留下好印象。【小题1】细节理解题。由文中的第五段第二句“When he opened the gate of the Little Princes Children's Home, he was faced by the excited children.”可知，当孤儿院的孩子看到他的到来，感到非常兴奋。【小题1】细节理解题。由文中的最后一段第最后一句“His book, Little Prince, came out last week.”可知，《小王子》这本书是康纳写的。【小题1】主旨大意题。纵观全文，都在围绕康纳参加志愿者活动后，发生了很大的变化这个话题展开的。

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解：（1）∵图象过点（4，5），
∴5=16-8+c．
解得：c=-3．????????????????
∴y=x2-2x-3．????????????????
∵y=x2-2x-3=（x-1）2-4，
∴抛物线的顶点坐标是（1，-4）．

（2）当y=0时，x2-2x-3=0．????
解得：x1=-1，x2=3．???????????
∴抛物线与x轴的交点坐标为（-1，0）和（3，0）．解析分析：（1）根据图象过点（4，5）可求c，得函数解析式，再根据顶点坐标公式求顶点坐标，或把解析式配成顶点式确定顶点坐标；
（2）令y=0解方程即可得抛物线与x轴的交点坐标．点评：此题考查了运用待定系数法求函数解析式和求函数图象与坐标轴的交点坐标．