33. must be 肯定/一定是
32. go to school by boat = take a boat to school 坐船去上学
31. depend on 取决于/依赖/依靠
30. make a difference 产生差异
29. be different from 与…不同
be the same as 与…一样
28. things are different 情况不同
27. others = other (students) 其他的(学生)
26. the other (两者中的)另一个
25. in other parts of the world 在世界上的其他地方
24. on the school bus 乘/坐校车