"Go down this road --- you find a space free," the camper sa

C . until 句子的意思是：沿着这条路走,直到你发现了一片空地!
until 在这里是 连接词 conj.
1.
直到...时,到...为止
He worked in Hong Kong until his father found him a job in Canada.
在他父亲给他在加拿大找到差事前,他一直在香港工作.
其他还有介词的意思 (用于否定句)在...之前,直到...(才)
She didn't go to bed until eleven o'clock.
她直到十一点才上床睡觉.