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。