单选题 The pilot lost contact with the military base, ______ the plane crashed in the desert.
A. among which B. for which
C. by means of which D. as a result of which

【正确答案】 D

【答案解析】[解析] 句法结构题。本句的意思是：飞行员与军事基地失去联络，结果飞机在沙漠中坠毁。定语从句题：which的先行词应是前面表示原因的句子，即用as a result of来表示。