列举春秋时期三个著名的霸主。

    Tony's father, Mr. Baker, lost his job last year. But now, he has his own fast food shop. It's not very big, but it sells a lot of food, drinks, desserts and soup. Many people like the hamburgers there. Today is Sunday. Tony got up very early. After breakfast, he went to his father's shop and made a line graph（线状图表） for him to show the number of hamburgers he sold. Now please look at the graph and today's menu to choose the best answer.

    To breed snails (蜗牛) well, you need to spray water to the container every morning and evening, change soil every two weeks, and feed them with cabbages and sweet fruits—this is what Sun Youxiang, a fourth-grade primary school student in Hangzhou____(conclude) after breeding snails for one year.

    From three small white snails at the very beginning____more than 60 snails of four generations now, he has done a great job in his assignment for his science class____(witness) the reproduction of animals is a precious experience for kids. Their____(create), patience, and respect for life will be stimulated (激发) as they learn to take care of animals on their own.

    Sun's teacher said the assignment served as a good example of life education. Practice____(be) an essential step in leaning, which will benefit the kids for____life time. Life education allows kids to know how to live with nature and creatures in a friendly way.

    Starting from this year, Science will become an____ (equal) important subject as Chinese and Math in primary schools____aims to improve students' knowledge about the surroundings____(draw) by curiosity, more kids will be willing to observe and think through practicing, which will add to____(they) recognition of the world in the long run.