Television first (17)__________ some fifty years ago in the 1950s. Since then, it has been one of the most (18)__________ sources of entertainment for both the old and the young. Television offers cartoons for children, world (19)__________, music and many other programs. If someone is interested in sports, for instance, he can just choose the right sports channel. There he can enjoy a broadcast of an international football match (20)__________ it is actually happening. Television is also a very useful way for companies to advertise their products.
It is not too hard for us to see why (21)__________ is a TV set in almost every home today. And, engineers are developing interactive TV (22)__________ allows communication between viewers and producers.
- A. appeared B. invented C. came D. happened
- A. cheap B. expensive C. popular D. impressive
- A. goods B. news C. things D. places
- A. as B. so C. and D. or
- A. it B. this C. that D. there
- A. who B. which C. what D. it
