问题补充：
—Could you please tell me ?
—Sorry, you can turn to Mr. Lee for help.
A. how long can man live without water
B. whether Yao Ming would play for Rockets or not
C. how I can keep myself safe from the flu
D. why did a serious landslide happen in Zhouqu, Gansu Province
答案：
A. how long can man live without water
B. whether Yao Ming would play for Rockets or not
(答案→)C. how I can keep myself safe from the flu
D. why did a serious landslide happen in Zhouqu, Gansu Province
解析： C 考查宾语从句。宾语从句用陈述句语序，排除A/D；时态要与主句一致，排除B。
