题目

 Usually, when your teacher asks a question, there is only one correct answer. But there is one question that has millions of current answers. That question is “What’s your name?” Everyone gives a different answer, but everyone is correct. Have you ever wondered about people’s names? Where do they come from? What do they mean? People’s first names, or given names, are chosen by their parents. Sometimes the name of a grandparent or other member of the family is used. Some parents choose the name of a well-known person. A boy could be named George Washington Smith; a girl could---_______should we clean the library?--- You should clean the library at least twice a week .A. How many B. How much C. How long D. How often