Beijing is the capital of China and it is one of  ______ cities in the world. 
#47633
A
big
B
bigger
C
biggest
D
the biggest
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Of the two T-shirts,I’d choose the ___one to save some money for a book.
#45561
A
cheapest
B
cheaper
C
more expensive
D
most expensive
I find it ______ that I can’t speak English well.
#45917
A
frustrate
B
frustrating
C
frustrated
D
to frustrate