把下面的六组图形分为两类，使每一类图形都有各自的共同特征或规律，分类正确的一项是（）

综合填空（共10小题，每小题1分；满分10分）
根据短文意思，用方框中所给词语的适当形式填空，使文章通顺、完整（其中有两个多余选项）。

useful,  visit ,  travel,  knowledge,  two,  with, popular,  come,  but,  advantage,  other,  in

Travel is useful to us in at least three ways.
First, by小题1:_ we can enjoy the beautiful scenery （风景）of different places. We can see小题2:our own eyes many things which can not be read about in books, and__小题3:__some famous cities and scenic spots.
小题4:_, we will meet people with different interests and see strange and different things when we travel. We can get ideas of the conditions and customs of  小题5:_ people, taste different foods and local favors （偏爱） if we like._小题6:_ this way, we can understand how different other people live.
Third, travel will not only help us gain （获得）小题7:_ of geography and history and other knowledge,_小题8:__will also help us keep healthy and make us less narrow-minded （才智有限的）.
With all these _小题9:_ of travel, it is no wonder(难怪) that travel has now become more小题10: than ever in China.