3. Поставьте необходимые предлоги места (at, in, on, near, between, under, above).
1. A woman is holding an umbrella … her head. above
2. It’s too hot and sunny. Let’s stand … that tree. under
3. There is no life … the moon. on
4. He is building a house … the country. in
5. We’ll exchange the money … the airport. at
6. When you called I was sitting … my desk … the office. at/in
7. The elevator stopped … the second and the third floors. between
8. My colleagues were already sitting … the table. at
9. The dog is sitting … the plate waiting for the food. near
10. I saw you … TV last night. on
3. A microphone converts(A) messages(B), like sounds(B) or other data, into electronic impulses.(B)
4. All wireless communication devices(B)use radio waves(B) to transmit and receive signals.(B)
5. The transmitter uses(A) an oscillator to generate radio waves.(B)
6. Construction and utility workers(B)often use hand-held radios (B)for short-range communication and coordination.
7. Simple two-way radios(b), called walkie-talkies(B), have been popular children’s (1)toys(B) for years.(B)
8. An example of a device that sends(A)one-way transmission is a pager, which is a radio receiver.
9. Aircraft pilots(B) use radios(B) to communicate with air traffic controllers (B)at airports.(B)
10. A device that functions(A) both a transmitter and a receiver is called a transceiver.
11. Speakerphones(B) allow callers’ (1)hands(B) to be free.