Various summer camps being available we can choosebased on our own interest. A. eitherB.

问题补充：

Various summer camps being available, we can choosebased on our own interest.

A. either

B. one

C. each

D. it

答案：

A. either

(答案→)B. one

C. each

D. it

解析：考查代词。根据上下文可知并不是两者之间，排除A。one指代前面提及的可数名词单数camps，表示泛指。It指代上文提及的同一事物。Each指代三者或者三者以上的任何一个。