The Great Wall runs about 21,200 kilometres．
Wow! ______________．（ ）
A．It's OKB．Good idea
C．That's amazingD．You are welcome
Grandma wants to watch the program legal Report． Please the TV．（ ）
A．turn offB．turn onC．turn down
Paper﹣making by the Chinese in the Western Han dynasty（朝代）．（ ）
A．is inventedB．invented
C．was invented
﹣I don't know how to use the App Fun Dubbing．
﹣Ask Jimmy for help． He has lots of in doing it．（ ）
A．experienceB．troubleC．courage
China great achievements in science and technology since 1978．（ ）
A．makesB．madeC．has made
You can surf the Internet you want to know about the 2020 World Middle School Games．（ ）
A．untilB．afterC．if