语法填空（共10小题，每小题1分，满分10分）
More and more often we heard of people talking ____ Karaoke（卡拉OK）. But what on earth ____ is about， still remains a question for many people. Karaoke is a sort of acoustic equipment ____ was invented in Japan around the middle of the 1970's. It ____ (mean) "a band without people" in Japanese. In ____ (事实上)， it is just a music tape without words. This equipment first appeared in some public houses and snack bars， and ______(main) for the customers to enjoy themselves. Most of the music in Karaoke was popular music. Therefore， at times， when anyone felt like it， he might sing songs to the accompaniment of the music that came from the equipment. Shortly after its ______(invent)， Karaoke was spread to the whole world. It was _____ (introduce) to China and was welcomed by many people. ______ you are not a good singer， or even sometimes you may sing out of tune， you can always enjoy yourself by ______ (sing) Karaoke.