I think the Internetr is very helpful怎么回答?

I think the Internetr is very helpful怎么回答? ---I think the Internet is very helpful. 英语单项选择题,― I think the Internet is very helpful.― ___________ I think it helpful to do the housework和I think it is helpful We all think that the book is very helpful to us.为什么是helpful i think the plan for writing is helpful the girl is very p( ) and helpful. I think the telephone is the second ___ A.helpful B.more hel helpful,I,is,think,most,the,telephone,the,invention(连词成句） I think the most helpful invention is light bulb. It  & Yes,so i must go to see[the]dentist.He is very helpful,you k 怎么把The English corner is very helpful to me改成一般疑问句?