______tennis has been played for centuries, the modern game originated in England in the late 19th century. The main tournament is the annual Wimbledon fortnight, one of the 4 tennis "Grand Slam" tournaments.
【正确答案】 B
【答案解析】解析：句意：尽管人们打网球的历史已经延续了好几个世纪，但是现代的网球运动19世纪末起源于英格兰。wherefore理由；因此。thereby从而，因此。