a useful

a useful an useful animal?还是a useful animal? useful idea?还是 a useful idea?哈哈哈 ( )useful book a/an useful, useful What ________he gave me A a useful message B a useful information C a useful news D a useful advice what a useful book it _______horse is a useful animal . useful前是加a还是an learn a useful lesson是什么意思 an ufesul还是a useful You should try your best to remember____from this class A.nothing useful B.useful somethingC.useful everything D.everything useful Our government has done__to stop pollution.A.useful something B.useful anythingC.anything useful D.something useful The book is ___than that one.A.useful B.the most useful C.much more useful D.a little usefulThe book is ___than that one.A.useful B.the most useful C.much more useful D.a little useful A house is a useful animal 翻译 A dog is a useful a_____ O_____ ,it is a useful book