Travel is useful to us in at least three ways.
First, by ttravel/ travelling 【小题1】with we can enjoy the beautiful scenery (风景) of different place. We can see visit many which can be read about in books wSecond/ Secondly 【小题2】other our eyes and vIn 【小题3】knowledge some famous cities and interesting places.
S 【小题4】healthy , 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(风俗) of oadvantages 【小题5】popular people, taste different foods and local favors(偏爱) if we like. I 【小题6】 this way, we can understand how other different people live.
Third, travel will help us gain（获得）k 【小题7】 of geography and history , travel will also help us keep h 【小题8】 and strong.
With all these a 【小题9】 of travel, it is no wonder that travel has now bee more p 【小题10】 than ever in China.
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解析：
【小题1】by是介词，所以其后用名词或动名词；travel/ travelling
【小题2】see是不及物动词，所以其后加介词with组成及物动词；
【小题3】and后面接动词visit与动词see做并列谓语部分
【小题4】文章另起一行，而且前面用了first，所以后面用Second/ Secondly
【小题5】整句的意思是了解其他民族的状况和风俗，所以用other
【小题6】固定搭配in this way以这种方式
【小题7】gain是动词通过努力获得知识等等，所以填knowledge;
【小题8】考查词组：keep healthy保持健康
【小题9】第九题句首是整结句说旅游的优点或优势；advantages
【小题10】此空应填形容词，所以用popular符合句子意思。