New words：
monitor [ˈmɒnitə(r)]
v.监控；监视；监听；检查
n.班长；监测仪；屏幕；显示屏
Sample Sentences：
A monitor is a basic output device.
Your doctor will monitor your blood pressure.
The monitor plays an important role in our class.
The details of today's flights are displayed on the monitor.
New words：
flight [flaɪt] n.飞行；班机
Sample Sentences：
We're booked on the same flight.
We met on a flight from London to Paris.
If we leave now, I can catch the earlier flight.
Birds use warm air currents to help their flight.
New words：
delay [dɪˈleɪ]
v.延迟；推迟；延期；使迟到
n.延误；延期；耽搁；延迟
Sample Sentences：
The arrival of the train was delayed.
Your flight might be delayed… or even cancelled.
The plane's landing was delayed because of heavy fog.
Report it to the police without delay (= immediately) .
flight [flaɪt] n.飞行；班机；飞行
New words：
community [kəˈmjunəti] n.社区；社团；公众；社会团体
Sample Sentences：
I joined a reading community.
Our community has a big park for kids to play.
Many students do community service during summer vacation.
New words：
communication [kəˌmjunɪˈkeɪʃ(ə)n] n.通信；交际；交流；信息
Sample Sentences：
We are in regular communication by letter.
Animals have their own ways of communication.
The new airport will improve communications between the islands.