题目判断句子中括号里的介词使用是否恰当。The Saturday afternoon flew (by), and before we knew it, it was over.A. 正确B. 错误判断句子中括号里的介词使用是否恰当。The Saturday afternoon flew (by), and before we knew it, it was over.A. 正确B. 错误题目解答答案A. 正确