C. two-week¡¯s D. two weeks¡¯

16. __________ room is on the 5th floor. A. Lucy and Lily B. Lucy and Lily¡¯s C. Lucy¡¯s and Lily D. Lucy¡¯s and Lily¡¯s

17.I like that son of __________. A. John¡¯s sister B. John sister¡¯s C. Jo hn¡¯s sister¡¯s D. John¡¯s sister s

18.On __________, all the children can play games all day. A. Children¡¯s Day B. Childrens¡¯ Day C. The Children¡¯s Day D.children day

19.This is not my cap, but my __________. A. brothers

B. brother¡¯s C. brothers¡¯ D. brother

20. Tom's car is more beautiful than__________. A. his brother's and sister B. his brother and sister C. his brothers and sisters D. his brother's and sister's

21. I¡¯ll go and call at __________ right after scho ol. A. the doctor B. the Smiths C. Smith D.my uncle¡¯s