单项选择题
A．people know the whales are going to die B．the whales have to be carted away and buried C．the whales cannot be used as food D．no one can use the beach on those days
A．there is more food and water in space than on earth B．eating and drinking in space is a special problem C．astronauts can never eat or drink in a spaceship D．there is no food or water in a spaceship
A．Because they had a device called kinetoscope. B．Because they asked Thomas Edison to help them. C．Because they got a way of using their own devices. D．Because Thomas Edison had successfully solved certain problems.