Early rising is helpful in more than one way. First, it ____ us to have good health. We all need fresh air. It makes our health better to take morning exercise. But air is never so fresh as early in the morning. Early rising helps us in our studies. In the morning we learn ____ and find it easy to learn something ____ heart. Early rising makes people able to plan the work for the day. We can not work well without a good plan. Just as, "The plan for a year should be made in spring, the plan for a day should be made in the morning." So the popular ____ says, "Early to bed and early to rise makes man ____, wealthy and wise."

有学者指出，现代汉语的社会科学词汇中大约有70%来自日语。如：干部、科学、银行、组织、文化、艺术、卫生、医学等等。如果将这些日语词汇从现代汉语中清除，则我们将无法使用现代汉语。导致这一状况的原因是（    ）