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

A.the ones

B.ones

C.some

D.the other

答案及解析： A

解析：

根据题干中提供的语境，其先行词应该用人称代词ones，由于被定语从句所修饰，为特指，所以需加定冠词the。