Mobil phones are very popular now and they are ____ than before.
A. cheap
B. cheaper
C. cheapest
D. the cheapest
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Which is ____, ia bicycle or a computer?
A. expensive
B. more expensie
C. the most expensive
D. the more expensive
The Yellow River is one of ____ rivers in China.
A. long
B. longer
C. the longest
D. the longer
She is te second ______, student in our class.
A. tall
B. taller
C. tallest
D. the taller
Jane is _____ than Betty.
A. less taller
B. less tallest
C. less tall
D. not as tall