Are your family ready for rafting?---Yes I really want my children to experience that

问题补充：

--- Are your family ready for rafting?

---Yes, I really want my children to experience that they are young.

A. \

B. while

C. unless

D. if

答案：

A. \

(答案→)B. while

C. unless

D. if

解析：句意：--你一家准备好漂流了吗？--是的，当他们年轻时，我真的想让孩子经历一次。因为有两个句子，必须有连词，这里 that是指示代词，代替漂流一事。while当……时候； unless 除非； if如果；根据句意故选B。