It’s sometimes difficult to tell one twin from .A. anotherB. some otherC. otherD. the oth

问题补充：

It’s sometimes difficult to tell one twin from .

A. another

B. some other

C. other

D. the other

答案：

A. another

B. some other

C. other

(答案→)D. the other

解析：考查代词：A. another泛指，另一个B. some other一些其他的…C. other其他的…D. the other特指：另一个，句意：有时很难把一个双胞胎和另一个区分开。双胞胎是两个，一个是one，另一个特指，是the other。选D。