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) 8. There are ________ months in a year. A. twenty first B. twelve C. twelfth ( ) 9. Four plus(加 ) _______ is twelve. A. seven B. eight C. eighth ( ) 10. Tom is twenty years old. Today is his ________ birthday. A. twentieth B. twenty C. thirtieth ( ) 11. The fourth month of a year is _________. A. March B. April C. May ( ) 12. China’s National Day is the __________day in October. A. second B. third C. first ( ) 13. My book is blue. _________ is red. A. Your B. Yours C. Mine ( ) 14. Our chairs are new, _________are old. A. theirs B. they C. their ( ) 15. These are not your desks. They are __________. A. our B. their C. ours ( ) 16. This is not my shirt. It’s _________. A. my B. he C. his ( ) 17. I see _________ book in the library. A. hers B. her C. we ( ) 18. Look, is she _________ water? A. drinking B. drink C. drinks ( ) 19. Listen, what are these birds __________? A. does B. do C. doing ( ) 20. What _______ Mike and Sarah _______now? A. are, doing B. is, do C. is, doing