If you want to travel to a new place, what will you worry about first? The answer may be how to1the way.

    In big cities many people go from one place to2by bus, taxi or underground. The bus is a popular3of travelling.  If you want to use a bus  you should (应该） know4bus to take. You should5the timetable (时间表) right so that you can take the6bus and get to your place on time. And it's important for you to know7to get off.

    In the countryside (农村), 8can be much simpler (简单). In some places with small roads, people get to school or their offices by9. In my hometown we usually take a boat to school. In other places, students can go to school10foot because they live near the school.

$\frac{7}{8}-\frac{3}{5}+\frac{1}{8}-\frac{2}{5}$ =____

依次填入下面一段文字横线处的语句，衔接最恰当的一组是（    ）

    经济动物这个名词最早是日本人的“光荣称号”，形容他们整天忙忙碌碌，只埋头追逐金钱。___________，___________，___________，___________。___________，___________，谁若提起理想和信仰，哈哈大笑的准是经济动物。

①但这种身穿西服文质彬彬的动物并不在十二生肖之列，而是独立进化的一支

②但只吃同一种草——财富

③很快，该类动物批量进口，并迅速成长为职场大军

④他们每天出没于城市的水泥森林，尽管分工不同

⑤对金钱的嗅觉却相当灵敏

⑥虽然这种动物的表情木讷