We all know that Abraham Lincoln was______President of the United States.
A. 16
B. the 16
C. 16th
D. the 16th
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Miss Xu has been teaching______in the primary school for 3 years.
A. Grade Two
B. two grade
C. second grade
D. Grade Second
Could you tell me when you usually have______breakfast every day?
A. a
B. an
C. the
D. /
I will give you______second chance if you promise to be careful to use the machine.
A. an
B. a
C. /
D. the
The old professor still worked hard when he was______.
A. in his seventy
B. in his seventies
C. in seventies
D. in the seventy