I often warn children ____ in the deep river.

He said, “ Light travels much faster than sound.”— He said that light _______ much faster than sound

We are said to be living in______ Information Age, ______ time of new discoveries and great changes.

I go to ______work after _______breakfast every day.

lan _______forthe trip is very important.—I see, and he is sureto work it out on time.