The ____Summer Olympics in Munich saw the first appearance of badminton, as a demonstration sport.
A. 1968
B. 1969
C. 1971
D. 1972
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How many badminton events are included in the current Olympics?
A. 4
B. 5
C. 6
D. 7
The longest back boundary line is also called________.
A. The side line
B. The short service line
C. The lone service singles
D. The doubles’ line
Li Na has won __Grand Slam in total.
A. 0
B. 1
C. 2
D. 3
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