A
       Although American informality(不拘小节) is well known, many new visitors think that it shows a lack of respect.
       This is especially true in the business world. Americans often use first names upon meeting a stranger and don’t always shake hands. They often just smile and say “Hi” or “Hello” rather than using a more formal handshake. It is good to remember that to an American such an informal greeting really means the same thing as a formal handshake someplace else. Similarly, Americans do not usually give a special farewell(告辞) or handshake to each person when they leave a party of business meeting. They will often just wave goodbye to the whole group or perhaps say, “Well, so long everybody, I’ll see you tomorrow.” They then will leave. No handshakes. 
      Americans seem either totally(完全地) hurried and hardworking or totally informal and at ease. Often you’ll see men working at office desks without their suit coats and ties. They may lean far back in their chairs and even put their feet up on the desks while they are talking on the telephone. This does not mean to be rude. Once Americans leave the busy streets, they are easy and informal.

(   )1. From the passage, we can know Americans usually are _________.
A. cool  B. rude   C. lazy   D. informal