将下列段落翻译成汉语：In a single-engine or light twin-engine aircraft, the pilot calculates the length of runway required to take off and clear any obstacles, to ensure sufficient runway to use for takeoff. A safety margin can be added to provide the option to stop on the runway in case of a rejected takeoff.
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When is the French Open?
A. Mid-January
B. Late May to early June
C. June–July
D. August–September
The Wimbledon Open is played on ________.
A. Red & gritty clay tennis court
B. Hard court
C. Grass
D. Water
How many Grand Slam tournaments are there in total?
A. 2
B. 3
C. 4
D. 5
The term Grand Slam, refers to the achievement of winning all four major championships within a single calendar year within one of the five events.
A. 对
B. 错
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