it is useful.it is interesting 合并句子

It is ____ useful book.I borrowed it yesterday. I have tired it,but it is still ＿(useful). （ ）useful book it is Is it useful enough?是什么意思? it is useful.it is interesting 合并句子 O_____ ,it is a useful book I find that it is useful to learn English.it是形式主语, 【急】I have tired it,but it is still ＿(useful). i think It (is) useful to learn english well.括号里面的is要不要加? It is useful to become reconciled now?额.It is useful to become reconciled now? I don't think it is useful for me to finish the task ----?A can it B is it C can't it D isn't it 为什么 填冠词.2.This is a useful dictionary,I think.So it is,and it's( ) unusual one. What is more useful after it is broken? what is more useful after it is broken? I ( )a new dictionary.It is very useful.A.bought B.have bought This book is useful to me,so I _____ 20 yuan on it yesterday. I have a bike .It is useful for me to e( ). 形式主语后面加什么I know it is useful to learn a language well