(B)
One sunny afternoon，I went to a blood donation station in Jining.That afternoon was also my 18th birthday.I thought of what I was doing as a wonderful__13__to myself and to others.There was a long queue of__14__.I joined it excitedly but became more and more__15__as the queue moved forward.Finally，it was my turn.I sat down__16__a large box and extended my left hand.“Are you ready?” said the doctor with a warm smile.“Yes!” I replied with a confident smile in__17__.The needle was inserted into my vein(静脉).Seeing the red blood flowing，I felt a bit sick and dizzy.
“You should clench(紧握)and__18__your fist，” the doctor said.“Keep doing that until I tell you to stop.” I clenched and released throughout the whole process and__19__calmed down.By the end they had 400ml of my blood.
It means a lot to me that I__20__the start of my adult life with a blood donation.I think I was doing something special or meaningful on my 18th birthday.
13.A.surprise B.deed C.gift D.deal
解析 句意：我考虑着做点什么作为对自己还有他人的精美礼物。根据前文“my 18th birthday”可知C项符合语境。
答案 C
14.A.volunteers B.customers
C.patients D.characters
解析 volunteers，捐血是自愿的。因此选A，志愿者。
答案 A
15.A.embarrassed B.upset
C.nervous D.homesick
解析 随着自己捐血时刻的临近，感到紧张。embarrassed尴尬的;upset烦闷的，苦恼的;homesick想家的;均不符合语境。
答案 C
16.A.against B.around C.beyond D.over
解析 against靠着，倚着。
答案 A
17.A.turn B.return C.vain D.advance
解析 in turn反过来，作为回应;in return回报，报答;in vain徒劳;in advance提前;根据语境可知A项正确。
答案 A
18.A.grasp B.fold C.force D.release
解析 握紧拳头然后放开，这样不断重复。这是献血时必做的动作，下句中的“released”为提示。
答案 D
19.A.regularly B.swiftly C.gradually D.hopefully
解析 按医生的话去做，心情逐渐地平静下来。regularly有规律地;swiftly迅速地;gradually逐渐地;hopefully有希望地;C项符合句意。
答案 C
20.A.marked B.initiated
C.cultivated D.recalled
解析 过捐血标志着18岁成人的开始。mark表明，标志着;initiate开始，和后面的start重复;cultivate培养，养成;recall回想起。故选A。
答案 A
