There were no tickets _____ for Friday's performance.
—How long do you think it will be___ the Stock Market returns to normal? —At least one year, I guess.
His promise ___ he would marry her when he came back turned out to be a lie, ___ left the girl heart-broken.
If we ___________some measures, we might have prevented the environmental pollution.
Many Chinese universities provide scholarships for students _____financial aid.
Scientists are convinced _____the positive effect of laughter _____physical and mental health.