Classroo_, cl_ck, wi_dow, f_oor, ta_le.
a) It’s one o’clock.
b) It’s ten o’clock.
2.
a) This is a rubber.
b) These are rubbers.
3.
a) Those are pencils.
b) Those are books.
4.
a) These are bins.
b) That is a bin.
5.
a) This is a board.
b) This is a chair.