Our milk powder is especially suitable for children under 6, as it helps a lot to build the body's natural ________.
A.reservation
B.defence
C.variety
D.heritage
网友回答
B解析名词辨析。reservation预约；预订；自然保护区防护; defence防御；variety 种类；heritage继承物;遗留物;传统。句意：我们的奶粉特别适合6岁以下的儿童。因为它能增强身体的抵御能力。