目前，撒哈拉以南的非洲依然是世界上最贫困的地区，下列原因，不正确的是（    ）

下列句子中，没有语病的一句是     （   ）

世界卫生组织的事故调查显示，大约50%～60%的交通事故与酒后驾驶有关，因此，我国管理部门近几年不断加大对酒驾的处罚力度，如酒后驾驶机动车者一次记12分等．但有些人置若罔闻，扔抱着侥幸心理酒后驾车上路，请结合如图及所学知识回答问题：

阅读理解(A)
    My friend，Victor，is a zoo keeper in the National Zoo．His work is very interesting but it is hard．Sometimes it is dangerous，too．Every morning，the zoo keepers have to get up at five to prepare the food for the animals．Each kind of animal eats special food．For example，the lions must be given meat； the deer must be given grass and leaves； and the parrots must be given fruit and nuts．Sometimes some animals won't let the others eat their food．If this happens，each of them must be fed separately（分离的）．
    Every morning each cage （笼子） must be washed by the zoo keepers．This can be dangerous，especially with lions and tigers．To make the work easier，the animals are locked in the sleeping compartments（ 隔间） while the cages are being washed．When the animals are sick，the zoo keepers must look after them．Each sick animal is kept in a separate cage and given medicine．Sometimes they must be given injection．It is not easy to inject a sick lion!
    All the keepers live near the zoo．Each of them has a small house．There he lives with his family．They do not have holidays on Sundays and special holidays．Instead，each of them has a day off during the week．Each keeperhas a holiday on a different day from that of the other keepers．
    The most important job of the keepers is to look after the safety of the visitors．People must be stopped from doing dangerous things．Many people have been hurt because they did careless things，like putting their hands into the lion's cage．

柳宗元《封建论》载：“时有叛国而无叛郡，秦制之得，亦以明矣。"符合这一论断的历史时期是