AJUTORRRRRR!!!!!!!!!! DAU COROANA .
Fill in the blanks with the correct form of the verb in brackets(passive or active) , or with the impersonal it and the verb given .

1.During the Napoleonic wars , the French........(need) to feed their army . Napolon offered a prize of 12,000 francs for a solution . That is when the tin can.......(invent).
Tin cans.....(send) to the battlefield . But the problem was then how to open them . This proved very difficult . Many of Napoleon's soldiers......(go) into battle with only nine the tin opener...... (invent ).

2.The first waterproof watch , the Rolex Oyste .......( make) by Rolex company of Geneva . To test the first batch of watches , they ......(immerse) in water for theree vweeks.
...........(think) the time - keeping would be affected but it did not show the sligh test variation.