1). There are____ months in a year.December is the ____month of the year.
A. twelve; twelve
B. twelve; twelfth
C. twelfth; twelve
D. twelve; twelveth
2). During____ century, the worldpopulation has already reached 6 billion.
A. twenty B. the twentieth
C. twentieth / D. the twenty
3). Sunday is the____ day of the week.
A. seventh B. first
C. second D. third
4). Autumn is season in a year.
A. the fourth B. the third
C. a third D. the threeth
5). Tom was to get to school and I was______.
A. first; ninth
C. the first; the ninth
B. a first; a ninth
D. the second; the nineth
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