Is that ____uniform for the policeman?a.a b.an c.the d./ 我觉得选c是特指诶

Is that ____uniform for the policeman?a.a b.an c.the d./ 我觉得选c是特指诶 Is that ____uniform for the policeman?a.a b.an c.the d./ 我觉得a和d都对.可是想想看啊，b和c是错的，（老师说的）a的话陈述句就是that is a uniform for the policeman。d是that uniform is for the policeman那不就是a和c that is that is That is is that Is that that is That is that is That is that that is is that is that that is not is that is that is all,that is it ,that is right 区别? i think that that that that that is that that is is that is that that is not is that is 求高人解答#############thanks that is all right与that is THAT IS RIGHT?THAT IS ALL RIGHT? Is that really?还是Is that real?