读一读，找出每组单词中不同类的一个（每题1分，共5分）
（1）A. morning B. afternoon C. evening D. week
（2）A. post card B. bookstore C. dictionary D. comic book
（3）A. sing B. playing C. doing D. reading
（4）A. read B. buy C. visit D. tonight
（5）A. train B. subway C. plane D. stop