He's got himself into a dangerous situation __________ he is likely to lose control over the plane.
Eating too much fat can ________ heart disease and cause high blood pressure.
Mr. Lee, may I ask you a question? —______.
—Excuse me! Sir, is the swimming pool open all day?— .Only from 6:00 p.m. to 10:00 p.m.
We’d better discuss everything _______ before we work out the plan.
The next thing he saw was smoke from behind the house.