My father is _______. And we just had a party for his _______ birthday last weekend.
#51030
A
forty; fortieth
B
forty; forty
C
fortieth; forty
D
fortieth; fortieth
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Shanghai is  ______ years old.
#51757
A
seven hundred
B
seven hundreds
C
seven hundreds of
D
seven hundred of
__________ trees are yellow in autumn.               
#51910
A
The number
B
A number
C
A number of
D
The number of
Did you know the Earth is home to __________ animals?
#51201
A
million
B
millions
C
millions of
D
million of
______ volunteers are working for 2014 International Horticulture Exposition in Qingdao.
#50975
A
Thousands of
B
Two thousands
C
Thousand
D
Two thousands of