A. report the findings of a research into girls’ math ability

　　B. criticize those who hold the wrong belief that girls cannot do well in math

　　C. prove that the stereotype that girls do worse in math is wrong

　　D. help girls regain confidence in learning math well

　　【参考答案】1—4、BBCA

　　【由山东省2017模拟改编】

　　阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。Our body clock，or natural body rhythm，influences our energy and alertness．Paying attention to it can help us choose the suitable time of day when we best perform specific tasks．

　　The reality，however，is that most of us organize their time around work demands，school deadlines，commuting or social events．Doing whatever your body feels like doing is a luxury in today's fast-paced modem society．

　　But that doesn't mean it isn't worth trying．Obeying our body clock has significant health benefits．Disrupting our natural body rhythm，on the other hand，has been linked to problems such as depression，obesity，or headache，says Steve Key，a biology professor．

　　When the body clock can synchronize（使……同步）the rhythms of its natural processes，it “gives us an advantage in daily life”，says Key．

　　According to him，when it comes to cognitive（认知的）work，most adults perform best in the late morning．As our body temperature starts to rise just before awakening in the morning and continues to increase until midday，our memory，alertness and concentration gradually improve．

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