I went over what I have writ ten again and again ____________ I wouldn’t make any mistakes.

. Mr. Green requires that the students ______ cheat in any exam.

The murderer reached________his gun, and then shot at the man.[ ]

Bill, please turn down the music, ________Mum ________ Dad are sleeping.—Sorry, I’ll do it right away.

The visitors here are greatlyimpressed by the fact that _______ people from all walks of life are workinghard for _____ new Chengdu.