It suddenly        to the teacher that he hadn’t left any assignments(作业) to his students.

Diets are most effective when _____ with exercise.

 Her brother was _____ by the army because of his bad eyesight.

 The bus ________ with a loud noise of its tyres when the light turned red.

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