单项选择题
A. Martin will have completed his swimming. B. Martin will swim back home. C. Martin will celebrate with his family. D. Martin will swim to the city of Belem.
A. The world will need 60% more food. B. The world will need 60% more fresh water. C. The world’s population will increase 17%. D. Fresh water will be in short supply in many countries.
A. The victory over one’s fellow runners. B. The victory over former runners. C. The victory of will-power over fatigue. D. The victory of one’s courage over illnesses.