If an object weighed one pound 8,000 miles above the earth, it would weigh ______ on the surface of the earth.

A．The Earth Weight
B．Weight in Space
C．Changing Weight on the Earth
D．Weight on and off the Earth

A．Neither the Greek soldiers nor their enemy could understand the message.
B．African soldiers shouted from tower to tower to pass message.
C．Telephone was invented by a French engineer.
D．Only by using telephone could people send speech sounds quickly.