The invention of steam engine greatly spedup the industrial revolution, which _____ a lot to the take-off of the world.

Tom’s mother often requires that hemore time in studying English every day．

Why was professor Liu thundering inthe classroom yesterday?-A student’s interrupting his speech ____ the burst of hisanger.[ ]

依次填入下列各句横线处的成语，最恰当的一组是(　　)①当中国步入商品社会后，“顾客就是上帝”的理念被大力提倡，但这不等于说为顾客服务的人就是奴仆，顾客花了钱就可以________。②某领导干部酒后驾驶、超速撞人后非但不认错，反而骂骂咧咧，________，扬言要办案交警小心着点儿，这种做法严重损害了人民公仆形象。③大学毕业刚参加工作不久的小李真让人头疼：工作没有成绩时，他整天唉声叹气，悲观失望；工作稍有成绩时，便沾沾自喜，________。

.I don’t think should be allowed to drive.