Complete the given conditional sentences by choosing the appropriate missing verbs or verb phrases from the choices inside the parentheses. Write the correct answer on a separate long pad.
1. The water (boil, boils, boiled, will boil) when the temperature reaches 100 degrees Celsius.
2. I would have become a good reader now If I (spend, spent, will spend) the first few months of quarantine reading the available reading materials.
3. If I (am rich, were rich, was rich), I would not waste it on luxurious materials.
4. If a COVID-19 vaccine is already available, face-to-face classes (will resume, would resume, resume) in schools.
5. If we (are careful, would have been careful, had been careful), the COVID-19 pandemic would not have worsened.