The telephone ________ by Alexander Graham Bell in 1876.

1. A.
   was invented
2. B.
   has been invented
3. C.
   is invented
4. D.
   will be invented

The telephone _________ by Bell in 1876.

1. A.
   invent
2. B.
   invents
3. C.
   was inventing
4. D.
   was invented

The telephone           by Bell in 1876．

A．invent                  B．invents                    C．was inventing             D．was invented