The new appointment (任命) of our president _________ from the very beginning of the next semester.

Our English teacher insisted that the homework ________ tomorrow morning.

Only when they were told of the importance of time ________ wasting time is like wasting part of their lives．

But for their help, we ________ the program in time.

I called you last night, but nobody answered— Oh, I usually__________off my cell phone by 8:00 pm