Look at ______ book on the desk . Is it ______ useful one ?—Yes, it is . In the book there is much advice on how to learn math well.

Wha t do you think of Tom’s speaking? —-No one does in our class.

Do you have enough men to carry these chairs? —No. I think we need _______ men.

Is that his pen __________ the lost and found case?[ ]

There are many buses running in the street. Don’t go _____ it.[ ]