找出下面单词中意思不同类的一个，把它的序号写到前面的括号里。
( ) 1. A. Tuesday B. week C. Friday D. Monday
( ) 2. A. play B. do C. read D. tree
( ) 3. A. dance B. young C. sing D. speak
( ) 4. A. wonderful B. plant C. clock D. cartoon
( ) 5. A. salad B. hot C. fresh D. thirsty