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为研究生长素类似物2，4 – D对某植物插条生根的影响，一实验小组按下表进行了实验：    组别 步骤A组B组C组D组E组F组 配制溶液蒸馏水200mg/L 2，4 – D溶液400mg/L 2，4 – D溶液600mg/L 2，4 – D溶液？1000mg/L 2，4 – D溶液 选择插条选该植物生长时期、带芽数目等相同的插条若干支，随机分成六等分并编号 浸泡插条分别用等量蒸馏水、相应浓度2，4 - D溶液浸泡插条12小时 扦插及培养浸泡后的插条扦插在潮湿沙土中，培养时间及其他条件均一且相同 实验 Genzeb Tibeb is very bright. At only 11 years old, her future is looking promising.  She is ranked 2nd Out of 56 students at her govemment school in Addis Ababa, Ethiopia where she has been seleeted for a special program because of her talent. She knows she is special and proudly shows off her certificate and book signifying her accomplishments in this special program. But her future hasn't always looked so bright. While her mother, Bekelech, sacrificed immensely for Genzeb, she would not have been able to continue sending her to school. When her husband died, Bekelech was the sole provider for their five children. In order for them to survive, she began the daily routine of walking approximately 8-10 miles a day collecting sticks to sell near her 8' x 10' home in Kichene.  It wouldn't have been long before Genzeb would have been, forced to quit school in order to help her mom.    But Bright Future changed all that. Genzeb has been at Bright Future for 3 years.  Since Ethiopian schools let out early, Genzeb walks to the facility right after lunch.  Because of her high ability, she even helps teach the younger children there, building confidence and locking in important foundational academic skills. There's also other meaningful opportunities Genzeb experiences which allow her eyes to be opened to the different opportunities that are available to her if she completes her studies.  Field trips are one of her most favorite activities of all. She especially loved the one to Addis Ababa University.She knows it goes beyond fun trips, though. "I am happy because I get extra help for school from Bright Future," Genzeb shares.  At so many levels, her involvement with Bright Future allows her to receive a better education, which she values.  For one day she wants to help people in need by becoming a doctor.  And now she knows, that with a lot of hard  work, that dream might just become a reality. 小题1:What does the underlined word¨sole" in the second paragraph    probably mean?A．importantB．mainC．unableD．only小题2:According to the text, what is the major factor that can help Genzeb Tibeb continue  her school?A．Bright FutureB．Her talent.C．Her motherD．Her school小题3:From the text we can leam_______.A．Genzeb Tibeb quitted school for several years.B．Genzeb Tibeb was admitted into a famous university,C．Genzeb Tibcb was involved in Bright Future activities.D．Genzeb Tibeb had to earn a living by herself.小题4:According to the taxt, what is Bright Future probably?A．A student training centerB．A scholarship organizationC．A government schoolD．An orphanage organization小题5:Which of the following things didn't Genzeb Tibeb clo on Bright Future ?A．Collecting and selling sticks.B．Teach younger kids there.C．Lock in academic skills.D．Take part in field trips.