fill in only the triangles,you can find a warning!what is it

what can you find in the middle of a box We have left a hole in this puzzle ,can you fill it with the You can find out the informatio only in the ( ) way.A.right This is the only book_I can find.A that B which C it D with The dog was in my heart that only you can fill in the missin is that a dog in the garden?i can not find out ____ it is a what can we do?there is only one room in the hotel.it doesn' you can find out ___ the book you want is .A,where B,what C It's a nice book.You can find the book in the school l______ （ don't say eternity,what you can do is only to live in the don't say eternity ,what you can do is only to live in the p what you can do is only to live in the pre sent.