单项选择题
A．the surface temperature is too hot B．it is too cold there C．it is severely short of water D．it has a very thin atmosphere
A．taking drugs once in a while will not be harmful B．a single smoke of opium will make you an addict to it C．the authorities are honest in dealing with the drug problem D．It is a heroic activity to destroy all the drugs available
A．predictors B．witch C．weathermen D．a kind of Englishman