Many thousands of people rushed into the department store______ there was a sale on clothes.横线上为什么只能用once 而不能用 every time 两者倒底怎么区别还有every

Question

Many thousands of people rushed into the department store______ there was a sale on clothes.
横线上为什么只能用once 而不能用 every time 两者倒底怎么区别
还有every

Answer 1

首先,要连接的是两个句子,所以,中间应该用连词,而once 正是连词,可以连接两个句子,every time 并不是,只是一个短语,
once 的意思是：一……,就……,在意思上也符合这个语言环境的需要