Mr Zhang gave all the textbooks to all the pupils except who had already taken them .A.

问题补充：

Mr Zhang gave all the textbooks to all the pupils , except who had already taken them .

A. these

B. ones

C. the ones

D. the others

答案：

A. these

B. ones

(答案→)C. the ones

D. the others

解析：one本来是数词，但也可用作不定代词，代替前面刚提到的一个东西或人，避免重复前面刚提到的名词，有时one可以有自己的定语或冠词，甚至可以有复数形式，如：I don like these pink shirts . Will you plese show me the white ones ? (我不喜欢这些粉色的衬衣，请您把那些白色的衬衣拿给我看看好吗？)