My mother never has noodles             breakfast.

“古今称国计之富者莫如隋”，这一状况形成的原因主要是（  ）       

——More and more students wear glasses in our school these days.——I agree with you. Students ___ keep on doing eye exercises to protect their eyes.

“一个和尚有水喝，两个和尚挑水喝，三个和尚没水喝”，这个故事启示我们（  ）