【题目】No one can tell the exact number of U.S. pilots and fighter planes were lost in the Pearl Harbor air attack.
A.whoB.whichC.thatD.what
在线课程【答案】C
【解析】
考查定语从句关系词。句意：没有人能说出在珍珠港空袭中丧生的美国飞行员和战斗机的确切数字。本句为定语从句修饰先行词pilot and fighter plane，且先行词既含有人也含有物，故只能用that引导。故选C。