Don't cut it into______(piece)!It is useful

Though your maths is bad,don't ---- it ,for it's very useful It is ( ) useful book. It is useful book （ ）useful book it is What ------ useful advice it is! Is it useful enough?是什么意思? It is my t-___ to have my hair cut It is a piece of cut the apple into______(half) It is useful to learn some ___ English,isn't it?A.everyday B I don’t think it is { } coat Don't cry because it is over.