【题目】Jack is late again. It is ______ of him to keep others waiting.
A.normal
B.ordinary
C.common
D.typical

【答案】D
【解析】考查形容词辨析 A. normal正常的；B. ordinary 普通的；C. common普遍的；D. typical典型的。句意：杰克又迟到了，要别人等他，这是他的一贯作风，故选D项。