Did the police_____ the reason of the accident.A find B find out C look D look for

Did the police_____ the reason of the accident.A find B find out C look D look for 15.The police_____（catch）the thief yesterday.15.The police_____（catch）the thief yesterday. Look.The police_____(hunt)for the lost dog in the forest. The man_____(murder)last night.And the police_____(catch)the murderer yet. I wonder whether the police_____ that lost child or not.A have found B has been found C have been found D has found请告诉我选择的正确答案及原因，谢谢哦 Why did the people How did the train The police---after the criminalThe police_____(be)after the criminal.The radio you bought last week needs_____(rapair).Books of this kind_____(sell)well in that bookstore.They_____(quarrel)aboout a chair when the teacher came in.This is the first tim when did the accident happen Did you surf the Internet? what clothes did the children What did the cat do? Did you see the doctor? what did the Englishman do? when did the dinosaurs live? What time did the bell what did the pandas do How much did the ticket