Regular Public broadcasting followed shortly afterwards, first _________ on May 11th 1928 in New York.
We should take good care of our ____. Don't forget to rinse your mouth after meals.
Records, ____, walkman CD and MD are the same instruments that we can use to enjoy music.
The limited supply of water has been put into practice, take care to turn off the running ____ before you leave.
The bank is equipped with new alarm _____. We can say it's safe and reliable completely.
A_____ has taught us what atoms are made up of and how powerful the atom bomb is.