This book provides you with the simple basics for being physically fit. 【21】______ your age or present state of fitness, you

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问题       This book provides you with the simple basics for being physically fit.  【21】______    your age or present state of fitness, you will find within these pages all the  【22】______    you want or need to help you begin and  【23】______    a program of healthy and enjoyable exercise.
     【24】______    will you find it easy to  【25】______    charts for walking, running, swimming, cycling, and many more healthy exercise activities, you will also find the  【26】______    information  【27】______    why such exercise is good for you and  【28】______    an active lifestyle will  【29】______    your health and well-being. You will learn the important particulars about being properly tested. Exercise  【30】______    that have been used in the Ball State Adult Fitness Program over the years are provided. These charts are included for you  【31】______    at a  【32】______    and safe intensity—an effort level that helps you reap the  【33】______    of becoming physically fit.
      This book represents a sifting of knowledge and experience I have  【34】______    leading exercise programs for more than two decades. The  【35】______    of this book may surprise you,  【36】______    Wayne Anderson and I have assembled in this book as concisely and clearly as possible.
     Instead of being enrolled in our adult physical fitness program, you are reading this book. That puts me  【37】______    in trying to help you to become physically fit. We all know that teaching by the printed page is not  【38】______    The most effective instruction  【39】______    personal attention. But since this is not possible, I’m  【40】______    that the information on the page that follows will bring you as close as any absence can get to actually enrolling in our program.
【27】

选项 A、on
B、in
C、at
D、over

答案A

解析 本题考查介词用法。介词on在这里表示“关于…的信息”。
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