There is a wire pole along the road_____meterA.about fifty B.every fiftieth C.each fifty D.every 50 到底选哪个啊?

There is a wire pole along the road_____meterA.about fifty B.every fiftieth C.each fifty D.every 50 到底选哪个啊?
There is a wire pole along the road_____meter
A.about fifty B.every fiftieth C.each fifty D.every 50 到底选哪个啊?

There is a wire pole along the road_____meterA.about fifty B.every fiftieth C.each fifty D.every 50 到底选哪个啊?
C
意思就是每隔50米就有一个电线杆

这句话的意思是这条路每50米就有一根电线杆.
ABOUT是周围的意思.所以不符合语境.B选项fiftieth一看就知道它错
因为EACH可指两个或两个以上中间的每一个，而every只可指三个或三个以上中间的每一个.
所以应该选C

B.每隔50米。D.every fifty + meters才对，每50米.C\D均不能与单数meter搭配.A则没有争议. 答案为B