It is uncertain ______ side effects these weight-loss drugs will bring about, although hundreds of thousands of patients have taken it.
two exams to worry about, I have to work really hard this weekend.
We shouldn’t take for granted that we still have a lot of time before the Entrance Examination.
Ladies and gentlemen, please fasten your seat belts. The plane.
It snowed for days on end. We thought it would never come to end!
—Would you like to go out for a walk ? —.