题目

红花阔叶的牵牛花植株（AaBb）与“某植株”杂交，其后代的表现型为3红阔∶3红窄∶1白阔∶1白窄。“某植株”的基因型和表现型分别是 A. aaBB（白花阔叶）         B. AaBb（红花阔叶）     C. aabb（白花窄叶）         D. Aabb（红花窄叶） 答案：D20．When I was in the 8th grade in Ohio，a girl named Helen in my class had a terrible（41）D．As she was running to the bus in order not to miss it，she slipped on ice an（42）Bunder the rear wheels of the bus．She（43）Athe accident but was paralyzed from the waist down．I went to see her，in my 13-year-old mind（44）Dshe wouldn't live normally from then on．（45）Cthe years，I moved and didn't think much about Helen after that．Three years ago，in Florida，my oldest son was hit by a car while riding his bike，causing a terrible brain injury．While I was（46）Dmy son，a lady who said she was the hospital's social worker called．It was a particularly（47）Bday．I burst into tears for no reasons and（48）D．A short time later，a beautiful woman，in a wheelchair，（49）Binto my son's room with a box of tissues．After 16 years，I still（50）AHelen．She smiled，handed me the tissues and hugged me．I told her who I was，and after we both（51）Che shock of that，she began to tell me about her life since we last saw each other．She married，had children and got her degree so that she could（52）Dthe path for those（53）Bthan her．She told me that if there was（54）Ashe could give me，it would be（55）C． Looking at this wonderful，（56）Cperson，I felt small．But I also felt the first hope I had since learning that my son was hurt．From this person（57）DI thought would have no（58）Aof life，I learned that where there is life，there is hope．My son miraculously （奇迹般地）（59）Band we moved back north，but I owe Helen a（60）Athat I can never repay．41．A．woundB．incidentC．coincidenceD．accident42．A．feltB．fellC．steppedD．walked43．A．survivedB．escapedC．missedD．lived44．A．rememberingB．decidingC．doubtingD．thinking45．A．ForB．WithC．OverD．In46．A．searching forB．taking careC．putting awayD．looking after47．A．tiringB．tryingC．disappointingD．amazing48．A．ran offB．ran upC．rang upD．rang off49．A．walkedB．rolledC．marchedD．entered50．A．recognizedB．knewC．rememberedD．considered51．A．gave upB．broke downC．got throughD．looked into52．A．blockB．findC．makeD．smooth53．A．more fortunateB．less fortunateC．fortunateD．unfortunate54．A．anythingB．somethingC．everythingD．nothing55．A．moneyB．encouragementC．hopeD．strength56．A．blessingB．hopingC．givingD．receiving57．A．whomB．whichC．whatD．that58．A．qualityB．quantityC．valueD．virtue59．A．curedB．recoveredC．treatedD．failed60．A．debtB．loanC．lifeD．hope