Choose the right grammatical form in each gap to complete the text

When working with fire, one [shall|should|wouldn't|shouldn't]ever ignore technical and safety requirements. Nowadays, you [can|cannot|must|ought to]easily buy fireworks in almost every country. It's highly recommended that people avoid using counterfeit (fake) fireworks to prevent accidents which [should|may|cannot|must] end in tears. Fire shows are also very popular, especially for such occasions as festivals or weddings. One of such events went wrong and cost a fire showman his career and health. The performer named Eric Adams was to make a fire show at a wedding. He [must|could|might|had to]work with illegal fireworks, which were much cheaper than original ones. Unfortunately, when he started setting the rockets on fire, the counterfeit exploded right in his hands. The man survived the blast but lost both his arms. To [can|be able to|being able to|have been able to]live a normal life, he had to purchase expensive cyber prostheses, which would replace his missing limbs. Soon, Adams [can|be able to|was able to|had been able to]live independently. Nevertheless, at first, he faced some unexpected difficulties. For example, he [shouldn't|might not|must not|couldn't]find anything in his bag or pockets by touch without watching inside because his artificial fingers don't feel anything.