【题目】 When he was running after his brother, the boy lost his ___ and had a bad fall.
A.balance
B.chance
C.memory
D.place

【答案】A
【解析】句意：男孩在追他哥哥时，失去了平衡，重重地摔了一跤。A.balance“平衡”；B.chance“机会”；C.memory“记忆”；D.place“地方”。lose one's balance“失去平衡”。故选A项。