第一张的第一题是The police have been looking the accident,but....

we have been looking for the boy all the morning but he is n 非谓语1.We have been looking for the girl all the morning,but s The young couple have been looking for houses,but haven't ye she d___ the accident to the police. 大学英语阅读理解第一题Many of the world’s pollution problems have been 第一题Many of the world’s pollution problems have been caused b 第一题 If the weather had been better ,we could have had a picn ---------(give)more attention ,the accident could have been He might have been killed ___the arrival of the police The police have been observing his movements these days the police will have a difficult time police 是复数,have也有表示复数的 用所给的词组成句子因为考试急用,第一题：the thief\the police\track down\decided