Look， Grandma! ________ click on this icon， and then you can talk to the doctor．
So easy？ Do I need a special number or something？（ ）
A．SimpleB．SimplyC．EasyD．Easily
Mr．Jiang ____ the company to develop the 5G network for years． Now he works as the chief engineer in it．（ ）
A．joinedB．was a member of
C．has joinedD．has been a member of
Hello! This is Kevin speaking． May I speak to Mr Cao？
Please _______． I'll put you through．（ ）
A．come onB．move onC．hold onD．try on
The article says that one's personality depends on his animal sign．
You _______ read it for fun， but don't believe in that．（ ）
A．canB．mustC．shouldn'tD．needn't
A robot served us dinner last night． Don't you think we are living in amazing times？
I can't agree more． The ______ makes our lives easier and happier．（ ）
A．informationB．technology
C．discoveryD．competition
They offered courses _________ students know the importance of protecting the Huanghe River．（ ）
A．helpB．helpedC．helpsD．to help