题目

完形填空 （共20 小题，每小题1.5分，满分30分） 阅读下列短文，掌握其大意，然后从各题所给的四个选项中，选出最佳选项。 The story goes that some time ago, a man had a very lovely little daughter. One day the man  26  his 3-year-old daughter for  27  a roll of gold wrapping paper. Money was tight and he became  28  when the child tried to decorate a  29  to put under the Christmas tree.  30  , the little girl brought the gift to her  31  the next morning and said, “This is for you, Daddy.” The man was  32  by his earlier  33  , 除去下列物质中的少量杂质（括号内为杂质），拟定的实验方案可行的是A. NaOH溶液（Na2CO3）：加入适量的BaCl2溶液至恰好完全反应，过滤B. 二氧化碳（氯化氢气体）：依次通过足量的氢氧化钠溶液和浓硫酸C. MnO2固体（KCl）：加入适量水溶解，过滤，蒸发D. 氧气（水蒸气）：通过装有足量无水氯化钙的干燥管