完形填空。

     This i______ (1) a classroom. It is nice a______(2) bright, but it is s______ (3). The doors and w______(4) are clean. The desks and chairs are clean, t______(5). The walls are white. O______(6) the front wall there is a b______(72). The teacher’s desk is near it. On the desk there are s______(8) flowers and pencils. There is a clock on the wall. It’s not old. It is n______(9).Now there are o______(10) eight students in the room. They are cleaning the classroom.

28.

— I feel tired and sleepy.  — Why not stop _______?

A．to work

B．having a rest

C．to have a rest

D．to go on with your work