问题
单项选择题
Passage One
Concerning one’s sitting posture, which of the following is correct
A．One should prop his head with his elbows on the table.
B．One should hold an extra napkin.
C．One should be upright in his chair.
D．One should lean against the back of his chair.
答案
参考答案：C
解析：
[分析]： 事实细节的找寻和判断。 根据原文One is to sit up straight可判断C项说法与原文相符，该项为正确答案。[解题关键] 同义词替换。文中sit up straight与C项中upright意思相同。