This is ___ useful dictionary .选择：A.an B.a C.the D./

This is ___ useful dictionary .选择：A.an B.a C.the D./ ___ elephant is ___ useful animal.A.An;an B.An;a C.Thn;an D. This is a ( ) useful advice A a B an C the D 应选哪一个 This is ______ useful book. A. a B. an C. the D/ Dictionary is ______ useful tool.A an B a C / D This is ______useful dictionary.A.a B.the C./ D.an 单项选择 What is this,plese?---It is UFO.A.a B.an C.the D\ I think this is ___ interesting book.A,an B,a C,the D,/ Mr L A dictionary is an useful book.找错 an eiephant is-useful animal的横线应填什么?A.a B.an C.the D./ 选择：That is _______ useful book.A.a quite B.a very C.very a D 英语选择填空1.Is this dictionary?a.you b.yours c.your d.hers 2.It’