________it was a waste of time and energy，but she didn’t accept my advice.

If the students who killed themselves had only been more confident, their deaths ________.

下列各句中，表达得体的一句是

22—Can we meet at 3 o’clock tomorrow afternoon?— That doesn’t suit meI’m afraid I _____________

I am still suffering from a fever. If I _____ the doctor’s advice yesterday, I _____ from my illness. [ ]