.The Internet __________ of great value to us during our project.A was proved B proved C was proving D was being proved
When she was doing the cleaning yesterday, Mum found the ring that she _____ years ago.
Those brave men died, but their spirits ___.
He is one of the boys __ on time.
This bridge is __ for heavy trucks to pas through.
“You are not a new member, are you? ” “___. I joined only yesterday.”