Could you tell me at this time last weekend？
I was studying for the exams．（ ）
| A． |
what you were doing |
B． |
what were you doing |
| C． |
how were you doing |
D． |
how you were doing |
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
﹣How ! There are no workers in the bank．
﹣It's the first self﹣service bank in China．（ ）
A．strangeB．scaryC．boring