Решение:
1. There is no use trying to convince him; he has already made up his mind.
2. There is no use complaining about the weather; we can’t change it.
3. There is no use waiting for her; she is already late.
4. There is no use worrying about things that are out of our control.
Вопросы:
1. What’s the use of studying all night if you don’t understand the material?
2. What’s the use of saving money if you never spend it on anything meaningful?
3. What’s the use of arguing if neither side is willing to compromise?
4. What’s the use of making plans if you never follow through with them?