1. In Holland, meat........... in laboratories. a is being growing b is being grown c is been grown 2. Electric current........ by Alessandro Volta. a is discovered b has been discovered c was discovered 3. The international language Esperanto........ by a Polish doctor called Zamenhof. a was being invented b was invented c is invented 4. Wine......... in England since Roman times. a is being made b was made C has been made 5. The word gadget............... in the 1850s, by sailors. a was already being used b used already c has already been used 6. Fairtrade products ......... .. in over seventy countries around the world. a selling b are sold C sold
