4．If someone helps you out，should you"pay him or her back"？No-the best thing to do it is to"pay forward"by helping others．This is the （36）B I have learned from a movie called just that：pay it Forward．The main character David invites homeless people into his house so that he can pay forward others'love toward him．（37）D by the plot，I decided to donate blood as my own way of"Paying it forward"．
One sunny afternoon，I went to a blood donation station in Jining．That afternoon was also my 18
th birthday．I thought of what I was doing as a wonderful gift to （38）Cand to others．
There was a long queue of （39）A．I joined it excitedly but became more and more （40）Cas the queue moved forward．Finally，it was my turn．I filled out an application form and had a physical examination．Then I started to give blood．
I sat down （41）Aa large box and extended my left hand．"Are you ready？"said the doctor with a warm smile．"Yep!"I replied with a confident smile （42）B．The needle was inserted into my vein（静脉）and a stinging（刺痛的）pain hit me．Seeing the red blood flowing，I felt a bit sick and dizzy．
"You should clench（紧握）and release your fist，"the doctor said．"Keep doing that
（43）D I tell you to stop．"I clenched and released throughout the whole process and（44）Ccalmed down．By the end they had 400ml of my blood．
It means a lot to me that I （45）A the start of my adult life with a blood donation．I showed how I （46）Bpeople in need．Many students think about doing something special or meaningful on their 18
th birthday，but only by （47）D can we really make a difference and live a meaningful life．
| 36．A．experience | B．lesson | C．conclusion | D．comment |
| 37．A．Stimulated | B．Infected | C．Urged | D．Moved |
| 38．A．me | B．him | C．myself | D．himself |
| 39．A．volunteers | B．customers | C．patients | D．characters |
| 40．A．embarrassed | B．upset | C．nervous | D．homesick |
| 41．A．against | B．around | C．beyond | D．over |
| 42．A．in turn | B．in return | C．in vain | D．in advance |
| 43．A．even if | B．as though | C．because | D．until |
| 44．A．regularly | B．swiftly | C．gradually | D．hopefully |
| 45．A．marked | B．initiated | C．cultivated | D．recalled |
| 46．A．worry about | B．care for | C．turn to | D．approve of |
| 47．A．giving blood | B．entering colleges | C．correcting mistakes | D．taking action |
