He thinks that a computer is( )useful friend.A.a B.an C.the

He thinks that a computer is( )useful friend.A.a B.an C.the He thinks that ( )computer is ( )useful intention.a.a,an b.t ------------ useful computer it is!A.What a B.What an C.How that is ▁ interesting computer game.A.a B.an C.the D./ _television is more useful than _radio.A A,a B An,an C The,t The book is ___than that one.A.useful B.the most useful C.mu This is a ( ) useful advice A a B an C the D 应选哪一个 The computer is a useful machine. English is 什么 useful language in 什么world A.an,the B.a,the C. This is ______ useful book. A. a B. an C. the D/ This is ___ useful dictionary .选择：A.an B.a C.the D./ Look at the boy.He is ()good friend.括号里填什么?A a B an C the D