What will the world use for power when it_______ oil

Many of them turned a deaf ear to his advice, ________ they knew it to be valuable.

Schools often＿＿thediversity of students’talents because they typically focus on a narrow view ofacademic ability

My teacher______of us to hand in the compositions tomorrow.

How long _________ in Shanghai? —For just the weekendI was back after the meeting was over.[ ]