Whenever Betty attended one of her children's performances, she managed to keep a poker face. The underlined part means ______.
【正确答案】
A
【答案解析】无论贝蒂观看自己哪个孩子的演出，都尽量做到面无表情，不露声色。下划线部分的含义是——。A．expressionless“不带表情” B．absent-minded“走神的”C．distracted“分神的” D．calm“冷静的”注：短语a poker face的意思是“面无表情，不露声色”。