【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，重重地摔了一跤。A项“平衡”；B项“机会”；C项“记忆”；D项“地方”。lose one's balance“失去平衡”。故选A项。