11. Choose the correct option to complete the sentences. 1.-Who? Alexander Graham Bell. a. was the telephone discovered b. was the telephone invented c. was the telephone discovered by d. was the telephone invented 2. They kill crocodiles for their skin. a. A lot of crocodiles are killed for their skins. b. A lot of crocodiles are been killed for their skins. c. A lot of crocodiles are killing for their skins. d. A lot of crocodiles were killed for their skins. 3. Leonardo da Vinci painted the Mona Lisa many years ago. a. The Mona Lisa is painted by Leonardo da Vinci many years ago b. The Mona Lisa was painted by Leonardo da Vinci many years ago. c. The Mona Lisa was painting by Leonardo da Vinci many years ago. d. The Mona Lisa were painted by Leonardo da Vinci many years ago. 4. Hundreds of people use this highway every day. a. This highway is being used by hundreds of people every day. b. This highway is used by hundreds of people every day. c. This highway was used by hundreds of people every day. d. This highway has been used by hundreds of people every day.