题目

Mr Green didn’t know ______ last night.    A. when does his son come back          B. when his son comes back    C. when his son come home                D. when his son came home 答案：D2008年5月8日，经过严格选拔的15名登顶队员将奥运圣火顺利送上珠峰（海拔8844.43米）．这些登顶队员与平常人在生理上的主要区别在于（　　）A．血液中红细胞含量较多B．身材比较高大C．血糖含量远高于正常人D．心率比正常人快