15.Only those ______ knew well could be admitted to the party.A.he B.that C.who D.whom15.Only those ______ knew well could be admitted to the party.A.he\x05\x05\x05B.that\x05\x05\x05\x05C.who\x05\x05\x05D.whom需要理由，分析句子成分

15.Only those ______ knew well could be admitted to the party.A.he B.that C.who D.whom15.Only those ______ knew well could be admitted to the party.A.he\x05\x05\x05B.that\x05\x05\x05\x05C.who\x05\x05\x05D.whom需要理由，分析句子成分
15.Only those ______ knew well could be admitted to the party.A.he B.that C.who D.whom
15.Only those ______ knew well could be admitted to the party.
A.he\x05\x05\x05B.that\x05\x05\x05\x05C.who\x05\x05\x05D.whom
需要理由，分析句子成分

15.Only those ______ knew well could be admitted to the party.A.he B.that C.who D.whom15.Only those ______ knew well could be admitted to the party.A.he\x05\x05\x05B.that\x05\x05\x05\x05C.who\x05\x05\x05D.whom需要理由，分析句子成分
这个正确答案应该是 A
分析：
考察定语从句,句子缺少的成份,可以是人称代词,也可以是人名.
he/she/we/they/you/I/Tom/Bob这些都可以.
补充完整为：
Only those( whom )he knew well could be admitted to the party. whom省略啦.
翻译：只有他很熟悉的人才允许参加聚会.
不能选C ,因为who knew well这个定语从句缺少宾语,属成份残缺.
也不能选B,因为定语从句中,that并不能代表前面的those,表示人称身份,that并不具备实体意义.

选C
定语从句，who 引导修饰前面的先行词those, 在从句中作主语

选B