By the time the tour ends, the football team _______ twenty matches in four countries.
A、will play
B、will be playing
C、will have played
D、will have been playing
【正确答案】：C
【题目解析】：本题的考点是：将来完成时，将来完成时表示将来的某个时间已经完成的动作。by the time 后面的句子中，主句的谓语动词一般用完成时，这个句子的意思是：等到巡回比赛结束的时候，这支足球队已经在四个国家打了20场比赛了。
