How wide is the river?- About .A. 100-metres-wideB. 100 meters wideC. 100-metre-wid

问题补充：

--- How wide is the river?

--- About .

A. 100-metres-wide

B. 100 meters wide

C. 100-metre-wide

D. 100 meter wide

答案：

A. 100-metres-wide

(答案→)B. 100 meters wide

C. 100-metre-wide

D. 100 meter wide

解析：：要回答how wide···？可以用数词+meters +adj来回答，故选B