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1 . It is .......... in the city than it is in the country 
a . noisily
b . more noisier
c. noisier 
d. noisy
2 . She sings ...... among the singers I have known
a. the most beautiful  
b. the more beautiful
c. the most beautifully
d. the more beautifully
3 . She is .......... student in my class
a. most hard-working
b. more hard-working
c. the most hard-working
d. as hard-working