---Oh, doctor, the wound on my leg is infected.---You really shouldn’t have left it _______ to the sun.
.The conference aims to develop business and let people think about ______ they can have a positive influence on the planet.
—Can I ask you a few straightforward questions about yourself? —No problem.I like ______ when people are open and direct.
They went on well at first but eventually everything ______ they had worried about happened.
Either you or I _____going to the teachers' office after class.
—Hi, David, I heard you had an accident this morning. —Yes.Luckily, I hit the brakes in time ______ I would have been injured badly.