下列各项中加点虚词意义用法相同的一组（ ）

rners consider ________a computer,which is commonly considered _____a great help in our work and study.

Mary is in a difficult situation ________ we should help her.

Is that John’s book— No, it’s ______ book. ______ book is here.

He often takes ______ to the Santon Hotel.