A son took his old father to a restaurant for an evening dinner. Father， being very old and weak， while eating， dropped food on his shirt and trousers. Other diners watched him in disgust （恶心） while his son was calm.
　　After he finished eating， his son who was not at all uncomfortable， quietly took him to the wash room， took the food away from his clothing， removed the dirt， combed his hair and fitted his glasses firmly. When they came out， the whole restaurant was watching them in dead silence. The son paid the bill and started walking out with his father.
　　At that time， an old man among the diners called out to the son and asked him， “Don’t you think you have left something behind？”
　　The son replied， “No sir， I haven’t.”
　　The old man answered quickly， “Yes， you have！ You left a lesson for every son and hope for every father.”
　　The restaurant went silent.
　　True （T） or False （F）
　　（ ）1. The father dropped some food on the table because he was very old.
　　（ ）2. The father’s son felt uncomfortable， seeing this.
　　（ ）3. All the people in the restaurant were watching them in dead silence.
　　（ ）4. The son had left a lesson for every other son and hope for every father.