问题补充：
We could see that he was trying to his own responsibility for the delay, instead of accepting his fault.
A. run over
B. smooth over
C. pass off
D. turn down
答案：
A. run over
(答案→)B. smooth over
C. pass off
D. turn down
解析：smooth over(=make smooth, put right, balliate)使平息，使恢复正常的，掩饰：1)I will try to smooth their quarrel over.(我将设法平息他们的争吵。) 2)Don try to smooth over your fault.（不要设法掩饰你的过错。）
