It is always interesting to visi

It is always interesting to visit another country, especially for those who have never traveled abroad.Foreign ___26___ can be educational for anyone ___27___ he is interested enough to make preparations beforehand.Learning the language of a new country would be ___28___ for the traveler., but the benefits(好处)of such an effort would become clear at once ___29___ his arrival. It may not seem __30____ to him when he comfortably stays at home, but knowing __31____ to order a meal or rent a room is necessary for the stranger place. Without knowing the language, it is very difficult for the stranger to ___32___ the people of the new country and their customs. Of course, in our small world, ___33___ is often possible to __34____ someone who understands our own language, ___35___ this is only second—best for the traveler. To be sure, he can ___36___ places and things without the use of a language, but places and things are not he ___37___ of any country. To get the greatest benefit ___38___ a trip to another country, it is ___39___ important for the visitor to have an understanding of the ___40___ .
回答第27空
A、unless
B、if
C、although
D、so
【正确答案】：B