No matter how frequently ______, the works of Beethoven still attract people all over the world.
| A．performed | B．performing | C．to be performed | D．being performed |
Stop! You can never touch this machine when it ________, it is very dangerous.
| A．has been operated | B．will be operated | C．is operated | D．is being operated |
. I think that this film is _______ a film, it is also a good material for education.
| A．more than | B．not less than | C．at least | D．far from |
I don’t want to read all these old newspapers, please tell me where the __ ones are.
| A．last | B．latest | C．late | D．lately |
---- How did her family feel when you visited them?
---- My coming ________ the happiness of her family.
| A．added up to | B．added up | C．added | D．added to |
_________ to 100℃, water will boil.
| A．Being heated | B．Heated | C．Heating | D．To heat |