问题
判断题
All the flights be fore nine have been delayed because of poor visibility this morning.由于今天上午机械故障，9点钟以前的航班都被延误了。（）
答案
参考答案：错
搜题请搜索小程序“爱下问搜题”
All the flights be fore nine have been delayed because of poor visibility this morning.由于今天上午机械故障，9点钟以前的航班都被延误了。（）
参考答案：错