became ill. In fact, Pasteur believed he had a medical treatment for rabies, but he had never given it to a person before. At first, Pasteur was afraid to treat Joseph, but the poor child was dying. Pasteur gave Joseph an inoculation (预防接种) every day for ten days. Slowly, the child became better.

During his lifetime, Pasteur studied germs and learned how they cause diseases in animals and people. He developed vaccinations (疫苗) that prevent many of these diseases. On September 28, 1895, Louis Pasteur passed away, at the age of 72. The work of this great man has been of great help to modern medicine.

28. The story of Joseph Meister is given to _____.

A. express the author's sadness. B. introduce the subject of the text

C. show some common diseases in 1885. D. warn children to stay away from dogs

29. According to the text, young Louis _____.

A. was once badly hurt by a dog. B. was very interested in medicine

C. made a living by working for a chemist. D. had been thought highly of by his teachers

30. We can learn from Paragraph 3 that Louis Pasteur _____.

A. was always patient. B. was clever but proud. C. was a slow learner. D. was a humorous professor.

31. What would be the best title for the text ? A. Germs and diseases. B. Rabies: a terrible disease.

　　　　　　　　　　　　　C. The earliest chemist in France. D. Louis Pasteur: a great scientist.

　　　　　　　　　　　　　　　　　　　 D

　　It's true that many dads in the wild aren't interested in parenting, but there are some that work pretty hard to give their little ones a good start. Maybe one of these dads will make you remember your own dad!

The male giant water bug (雄性负子蝽) doesn't seem to mind a heavy load (负荷物) on his back for his kids. The female puts about 100 to 150 eggs on the back of the male, and then she leaves. Once the female is gone, the male has to look after the eggs. It usually takes one to two weeks for the eggs to hatch (孵化). The father giant water bug jumps around to make sure the growing eggs get enough air and water. All this time he can't fly because of the weight of the