（） is the lowest place in the desert.

单项选择题Why did the scientists work hard at mapping the human genome Because （）.

A．the human genome can destroy many illnesses
B．the human genome"s completion can help them get rid of many diseases
C．they wanted to be better known than others
D．the human genome can provide a lot of chances of work

单项选择题The reason father was in a hurry to get home was that he （）

A．wasn"t feeling very well
B．hated to drive in the dark
C．wanted to take some exercise
D．didn"t want to be caught by the police