They wonder _______.
if robots will think like a human in 25 to 50 years
if will robots think like a human in 25 to 50 years
when robots will think like a human in 25 to 50 years
Peter is ________of the three boys, but he’s _______than the other two.
—Where is Jack? —He _________ basketball on the playground.
There is ________ useful book on the desk, _________ useful book belongs to my brother.
Could you tell me________?
Smoking will_______ your health.