【问】 Inland canals are used farm and factory to towns seaports.(TOEFL，81. 11)

我认为上题中的are used to shipping是正确的格式。

【答】 应当弄清be used to do和be used to doing这两种结构的区别：前者用于表示“(被)用来做……”(动词不定式是目的状语)，而后者表示“习惯于……”(参见used to do /be used to)。

请做下面的英语试题：

In Louisiana，the term “Greole” is often used to distinguishing the descendants of theoriginal French settlers from the Cajuns. (TOEFL，87.12)