There are ____ workers in the factory.
A. thousand
B. thousands
C. thousands of
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Kathy won the girls' _____ race in the school sports meeting last week.
A. 100 meters
B. 100-meters
C. 100-meter
Where are the students? They are in _______.
A. the Room 8
B. Room 8
C. the 8 Room
If these trousers are too big, buy a smaller _______.
A. pair
B. one
C. set
She is the tallest of _____ in the family.
A. any sister
B. all the sisters
C. all her sisters