The twins are so much alike that it is difficult to tell one from.A. otherB. the otherC. o

问题补充：

The twins are so much alike that it is difficult to tell one from.

A. other

B. the other

C. others

D. another

答案：

A. other

(答案→)B. the other

C. others

D. another

解析：本题的含义是双胞胎很像，把一个与另一个辨别起来很困难，表示两种当中的一个和另一个，应用one……the other，故选B。