Nobody knows how to operate the new machine ______ .[Add a question tag]
Adoes they?
Bdon't they?
Cdoesn't they?
Ddo they?
Adoes they?
Bdon't they?
Cdoesn't they?
Ddo they?
Related Questions:
Add a suitable question tag.
My brother seldom smiles at his classmates, _______?
Select an appropriate question tag for the following sentence.
I am an artist , _____ ?