—What caused the accident?—It was my fault sir. I to the left.A. ought not to have turne

问题补充：

—What caused the accident?

—It was my fault, sir. I to the left.

A. ought not to have turned

B. needn’t have turned

C. shouldn’t turn

D. couldn’t turn

答案：

(答案→)A. ought not to have turned

B. needn’t have turned

C. shouldn’t turn

D. couldn’t turn

解析：本题的语意环境为：是我导致了这场事故，我本不该向左拐。ought not have done=shouldn’t have done本不该做某事；needn’t have done：本来没有必要做某事而做了。故选A。