单选题 Soon after he reached Australia, Captain Cook ______ to draw the map of the .east coast.

【正确答案】 D
【答案解析】考查短语辨析。set about doing sth.或set out to do sth.都表示“着手(开始)干某事”,而set off表示“动身,出发”,set sail“航海,航行”。