Had it not been for the police’s help Peter his bicycle yesterday afternoon.A. could not

问题补充：

Had it not been for the police’s help, Peter his bicycle yesterday afternoon.

A. could not find

B. could not have found

C. didn’t find

D. hadn’t found

答案：

A. could not find

(答案→)B. could not have found

C. didn’t find

D. hadn’t found

解析：本句是if引导的虚拟条件句的省略，Had it not been for the police’s help=If Peter hadn’t got the police’s help。从yesterday afternoon可知是与过去相反，主句使用would/could/should/might+have done,故选B答案。句意：要不是警察的帮助，彼得昨天下午不可能找到他的自行车.