I can’t count how many times people have complained, while shaking their heads in obvious

I can’t count how many times people have plained, while shaking their heads in obvious disappointment,“just don’t know what is with teenagers today.”
The other day I was in my car on my way to the farmers market when I passed two teens standing by the side of the road with a car washing sign. My car was filthy and my heart was full, so I pulled over. There was a group directing the cars and another group spraying them down. As sponges(海绵) were wiped over every square inch of my dirty car, I sat enjoying the little water bottles. I was amazed at why forty to fifty teenagers had devoted their Saturday to washing cars.
After I handed them a twenty-dollar bill I asked what they were raising money for. They explained to me that a friend of theirs, C.T.Schmitz, had recently died of cancer. He was only fifteen years old. He had gone to school with a lot of the teenagers who were there that day and each of them had memories of a boy sweeter than any they had known. His friend Kevin had decided to put this car wash together because he wanted to honor his friend and also bring together his classmates with his boy scout troop(童子军). He told me that they wanted to plant a tree in front of their school and if they raised enough money they would put a plaque(纪念匾) there also. Both would be in memory of their friend C.T.
They handed me a bag of homemade cookies with my receipt(收据) saying“Thanks for helping us plant a tree of C.T.”
Yeah! I don’t know what is with teenagers today!
【小题1】From the passage we can know that the boys were raising money to     .A．buy a plaque for their school .B．help those who suffered from cancer.C．first plant a tree in memory of their friend.D．put a plaque near their friend’s home【小题2】From the passage, we can infer that C.T.Schmitz was     .
A. kind-hearted but lonely          B. brave and popular with his classmates
C. shy and sensitive               D. a boy you can get a good impression of
【小题3】What does the underlined word  “ filthy”mean?A．newB．dirtyC．good-lookingD．ordinary【小题4】What would be the best title for the passage?A．Teenagers TodayB．A Special DayC．My view on TeenagersD．An Exciting ExperienceC