Question

The first mobile phone networks__________ (create) in the late 1970s in Japan. A cell phone combines technologies, mainly telephone, radio, and computer. Cell phones work as two-way radios. They send electromagnetic microwaves from base station to base station, The waves ________ (send) through antennas. This is called wireless communication.
a. was created, were sent
b. were created, were send
c. were created, are sent
d. are creating, were send
e. will be created, was being sent

Answer 1

c. were created, are sent