Each of the singers a swimming pool.
A. has; fifty-metres-long
B. have; fifty-metres-long
C. has; fifty-metre-long
D. have; fifty-metre-long
网友回答
A. has; fifty-metres-long
B. have; fifty-metres-long
(答案→)C. has; fifty-metre-long
D. have; fifty-metre-long
解析：each of sb作主语时，相当于三单形式，故第一空选has，而后一空要选的是数词+连字符-名词单数+形容词作定语，故选C