It is widely acknowledged that students should be   in terms of overall quality.

Dark clouds _______ the sunlight. It seemed as if it was going to rain.

Soon all the people at the meeting_____ on the discussion of developing the local education.

His first baby was born soon after he got married, which seemed to have _____ his sense of responsibility.

—Have you ________ him to keep good hours?  —Yes, I have. But he doesn’t listen to me.