问题
单项选择题
·Look at the questions for this part.
·You will hear a passage about "American Weighs In ". You will listen to it twice.
·For questions 24-30, indicate which of the alternatives A, B, or C is the most appropriate response.
·Mark one letter A, B, or C on the Answer Sheet.
What is the percentage of adults aged 20 to 74 who were obese in the 1960s
A．33 percent
B．24 percent
C．35 percent
答案
参考答案：B