Circle the odd one out

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Exercise 2. Circle the odd one out.
1. A. behave
B. Monday
2. A. January
B. April
B. cheer
3. A. calendar
B. taboo
4. A. temple
5. A. kitchen God day
C. Christmas
A. flower
6.
7. A. air
8.
9. A. papaya
10. A. nice
A. orchid
B. reuse
B. water
B. early
B. watermelon
B. city
D. Thursday
D. shake
C. Tuesday
C. October
C. decorate
C. firework
B. New Year's Day
D. understand
C. reduce
C. soil
C. kumquat tree
C. hard
C. tower
D. get wet
D. throw
D. recycle
D. behave
D. marigold
D. mango
D. taboo