--- Hurry up! The bus is coming.
--- Wait a minute.Don’t cross the street the traffic lights are green.
| A．after | B．until | C．while | D．Since |
﹣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
Blue whales are ． We should try to protect them．（ ）
A．in timeB．in publicC．in danger