It was great shock to the world that two aero-planes crashed into World Trade Center in New York o September 11th, 2001.
A. a; /
B. a; the
C. the; the
D. /; the
网友回答
A. a; /
(答案→)B. a; the
C. the; the
D. /; the
解析：选B。shock指代具体事情时为可数名词，a great shock意为“一次沉重的打击”；由普通名词构成的建筑类专有名词需加冠词，故答案为B。