___himself by a table ,the gentleman asked the waiter for a cup of coffee politely.

问题描述:

___himself by a table ,the gentleman asked the waiter for a cup of coffee politely.
A.seated B.seating C.to seat D.seat 选B

seat oneself 是坐下的意思.前面没有主语,就意味着seat的逻辑主语是主句主语the gentleman,所以前面用现在分词短语