4．Her name is Mary，__________?

A．is she                         B．is it                     C．isn't she                  D．isn't it

3．It's too late．We must stop __________ and go home quickly．

A．play                     B．to play                 C．playing                  D．played

2．The boy __________ in the room，but I am not sure．

A．maybe                 B．may be                C．may is                   D．must be

1．The old desk is __________ wood．

A．made of               B．made in               C．made from            D．made with