To the thief’s surprise a tourist filmed his stealing the money.A. by accidentB. by the a

问题补充：

To the thief’s surprise, a tourist filmed his stealing the money.

A. by accident

B. by the accident

C. in accident

D. in the accident

答案：

(答案→)A. by accident

B. by the accident

C. in accident

D. in the accident

解析：本题的含义是令小偷诧异的是一个游客碰巧拍摄了他偷钱的经过，by accident可以表示偶然或碰巧的意思，故本题选A。