Odd one out:

EX 2:Odd one out

1.    a. compass                 b. textbook           c. calculator          d. judo

2.    a. English                  b. play                   c. science              d. history

3.    a. have                       b. share                 c. study                 d. with

4.    a. classmate               b. remember         c. knock                d. help

5.    a. uniform                  b. post office        c. library               d. classroom