题目

下列反应中，属于取代反应的是（ ）     ①CH3CH=CH2+Br2CH3CHBrCH2Br     ②CH3CH2OH CH2=CH2+H2O     ③CH3COOH+CH3CH2OHCH3COOCH2CH3+H2O     ④C6H6+HNO3C6H5NO2+H2O      A． ①②          B.  ③④           C．  ①③                              D.  ②④ 答案：BI arrived at my mother's home for our Monday family dinner. The smells of food      over from the kitchen. Mother was pulling out quilt (被子) after quilt from the boxes,     showing their beauties. She was        for a quilt show at the Wooden Church. When we began to fold and put them        into the boxes, my attention was        by something at the bottom of one box. I        it out. “What is it?” I asked.“Oh?” Mom said, “that's Mama's quilt.” I        the quilt. It looked        a group of school children had        it together: irregular designs, childish pictures, a crooked        on the right.“Grandmother made this?” I said,       . My grandmother was a        at making quilts. This didn't certainly look like any of the quilts she had made.“Yes, right before she died. I brought it home last year and made some       ,” she said. “I’m still working on it. See, this is        I’ve done so far.”I looked at it more closely. She had made straight a crooked line. At the center of the quilt, she had stitched a piece of cloth        those words: “My mother made many quilts. She didn't get all line       . But I think this is beautiful. I want to see it finished. Her last quilt.” “Oh, this is so nice, mom,” I said. It        to me that by completing my grandmother’s quilt, my mother was        her own mother. I realized I held in my hands a family       . It started with the loving hands of one woman, and continued with the loving hands of another,        two generations. 【小题1】 A．flew B．rushed C．floated D．wandered 【小题2】 A．proudly B．slightly C．calmly D．hopefully 【小题3】 A．trading B．reaching C．asking D．preparing 【小题4】 A．up B．down C．back D．off 【小题5】 A．drawn B．shocked C．embarrassed D．excited 【小题6】 A．raised B．pulled C．caught D．held 【小题7】 A．pressed B．folded C．spread D．arranged 【小题8】 A．even if B．if only C．as if D．only if 【小题9】 A．picked B．added C．chained D．pieced 【小题10】 A．line B．bar C．stick D．mark 【小题11】 A．delighted B．scared C．surprised D．worried 【小题12】 A．master B．beginner C．scholar D．customer 【小题13】 A．decisions B．dresses C．changes D．progress 【小题14】 A．how B．which C．where D．what 【小题15】 A．to B．with C．for D．by 【小题16】 A．straight B．wrong C．mixed D．respectable 【小题17】 A．occurred B．happened C．replied D．struck 【小题18】 A．promoting B．moving C．honoring D．approaching 【小题19】 A．custom B．treasure C．memory D．award 【小题20】 A．passing B．holding C．satisfying D．covering