These police often_____the children across the streetA.help b.helps c.helping d.is helping选哪个为什么?

police police The police ____(search) for the thief these days ,but they haven't found him yet Police _(调查)the disappearance of two children these days (look) The police have been observing his movements these days为什么observing不是observed The police （look）at the scene for other clues these填空 为什么选A?these police 不是集体名词应该用复数吗? These police often_____the children across the streetA.help b.helps c.helping d.is helping选哪个为什么? After h__ these words,the police called Jim's father,and he told them what she said was true these these she often__(do) her homework at home in the past What __they often__（do） on monday?怎么填 Her mother often__(do)housework at the weekends His mother with his father often__(go)to movie.填空. Mr.Green often__(drink) a lot when he was young. These days the police ___looking for him everywhere.Do you know where he is?A.is B.was C.were D.are believing these people have their special___,the police have been keeping a watch on them.A.ideas,good B attempts,close C ways,tight D minds serious