Travellingisarelaxin的精选

问题详情：阅读填空;阅读短文及文后选项，选出可以填入空白处的最佳选项。Travellingisarelaxingandpleasingactivity.Doyouwanttotravel?Ifyoudo,you’dbetterpayattentiontothesethings:___1___Beforegoingonatrip,youn...