When the man came in, gun in hand ,we all stood there, .
A. astonishing
B. being astonished
C. astonished
D. having astonished
网友回答
A. astonishing
B. being astonished
(答案→)C. astonished
D. having astonished
解析：考查形容词做状语：句意：当这个人手拿枪进来的时候，我们都站在那里。很惊讶。这里可以用形容词做状语，表示状态，astonished修饰人，astonishing修饰物，选C。