找出与其他三个不同类的单词或短语。
(______) 1. A. train B. taxi C. shop
(______) 2. A. must B. often C. sometimes
(______) 3. A. red light B. traffic light C. yellow light
(______) 4. A. Chain B. USA C. Beijing
(______) 5. A. stop B. wait C. light
(______) 6. A. early B. late C. bookstore
(______) 7. A. foot B. taxi C. train
(______) 8. A. children B. parents C. books
(______) 9. A. morning B. afternoon C. lunch
(______) 10. A. by B. on C. take