▲ 下篇短文共有5個空格，為第26至30題。        As an old saying goes, “Nothing in life is free.” No matter who made up this proverb, he obviously hadn’t been introduced to CouchSurfing. CouchSurfing, also    (26)    CS, is a way that travelers with restricted budget can stay with people around the world who are willing to share their accommodation for free. The phenomena of CouchSurfing    (27)       in 2004. Since then, CouchSurfing (28) to become an internationally organization. Now, it gets more than six million members worldwide.        The advantages of CouchSurfing are numerous. Among them, the most attractive one is travelers such as backpackers can not only be provided with an alternative accommodation which is totally free of charge,    (29)       be offered a unique opportunity to encounter local perspectives from the area    (30)        they are traveling. In this way, they can travel like a local and experience the world in a way that money can’t buy.  
【題組】26.
(A)called
(B)calling
(C)to call
(D)to be called