单选题 Mr. Wang gave all the textbooks to all the students, except ______ who had already taken them.
【正确答案】 C
【答案解析】 [解析] these who…意为“……的这些人”，由此可排除A项。句中出现了all the students，由此可知题意为“除去……的学生”，故D项排除。that指代前文的不可数名词，theones表特指。