unit 6When was it invented?It was invented in the sixth century. China is an old country with a long history of about five thousand years.When was it invented? abacusWho was it invented by? It was invented by ----.When was it invented? It was invented in ----. --------- gun powder the ancient Chinese people compass Bi Shen printing Han Dynasty Cai Lun paper making Han Dynasty when who things Who was it invented by?When was it invented?What is this called?Tang DynastyDuring the time of War PeriodSong DynastyPair work. --------- gun power the ancient Chinese people compass Bi Shen printing Han Dynasty Cai Lun paper making Han Dynasty when who things This is called _______. It was invented by ______, and it was invented in ________.Tang DynastyDuring the time of War PeriodSong DynastyFree talk.Guessing gamesThere are also many modern inventions in the world. What invention is it?Here is a box with a beautiful glass face. It looks like a TV , but it isn’t .It can help you work and study.Guessing gamesHere is a box with a beautiful glass face .You can see different p |
