---It is not a secret that CEOs of major companies earn a large amount each year.--- I agree. ____ the hard economic times, it seems that their salaries have remained the same.

Isn't it time that children         to bed since it is too late?

His advice couldn’t help ____ her health, so she couldn’t help ____.

Before my father moved off, he told me again and again that I should ________ the rules and regulations of the school.

(2013·太原五中模拟)The traffic problems we are looking forward to seeing ________ should have attracted the government's attention.