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his students could understand him B.his students wouldn39。t be afraid of him C.his students carefully watched him making the experiment D.his students could do well in chemistry38.That day Charlie wished ___________. A.his students could learn the chemical reaction B.his students could find the atom of carbon C.his students could count(數(shù)) the atoms of carbon D.his students could make the experiment39.The students couldn39。t answer Charlie39。s questions because___________. A.none of them had seen the atoms B.they didn39。t understand their teacher C.the chemical reaction was too plicated D.they all wanted to drop the subject40.In fact,_______________ . A.Charlie failed that day B.the student in the back row didn39。t watch her teacher carefully C.the student in the back row hadn39。t learned chemistry before D.Charlie failed in making the experiment BDuring the 20th century there has been a great change in the lives of women. A woman marrying at the end of the 19th century probably have been in her middle 20’s and would be likely to have seven or eight children. By the time the youngest was 15, the mother would have been in her early 50’s and would expect to live a further 20 years, during which chance and health made it hard for her to get paid work. Today women marry younger and have fewer children. Usually a woman’s youngest child will be 15 when she is 45 and she can be expected to live another 35years and is likely to get paid work until 60.This important change in women’s life has only recently begun to have its full effect on women’s economic position. Even a few years ago most girls left school and took a fulltime job. However, when they married they usually left work at once and never returned to it. Today the schoolleaving age is 16, many girls stay at school after that age, and though women marry younger, more married women stay at work at least until shortly before their first child is born. Very many more return to work later. Such changes have led to a new relationship in marriage, with the husband accepting a greater share of the duties of family life.41. We learn from this passage that in the 19th century_____ . A. there were more children in the world than there are today B. women spent a greater part of their lives raising children than they do today C. there were more women in poor health than there are today D. women married younger than they do today42. One reason why a married woman of today may take a job is that ____. A. she is usually younger when her children are old enough to look after themselves B. she is obliged to help her husband support the family C. she feels lonely at home when her children grow up D. she hopes to change the world a bit by doing up43. Many girls are now likely to ____. A. give up their jobs after they get married B. leave school as soon as they can C.