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There were          different kinds of dinosaurs in the word in the past.
#51715
A
hundred of
B
two hundred of
C
hundreds of
D
two hundreds of
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–How often do you wash your hair? 
#51813
A
One day
B
Twice
C
Twice a week
D
Two times a day
Beijing is ____ largest city in China.
#51686
A
the second
B
a second
C
second
D
a
—David, how old is your father this year?—______. And we just had a special party for his _____ birthday last weekend.
#51864
A
Fortieth; forty
B
Forty; forty
C
Forty; fortieth
D
Fortieth; fortieth
The earthquake killed ____   ___ .people .
#51254
A
thousand
B
three thousands
C
thousands of
D
three thousands of .
This is Tony's         .visit to Jinan. He has been here once before.
#51007
A
first
B
second
C
two
D
one