Read the text below. Match choices (A-H) to (17-21).There are three choices you do not need to use.Write your answers on the separate answer sheet.

A radio receiver is a device that is connected to an antenna and is used to perform radio reception, that is, to extract signals from radio emission.  This device was created by a Russian physicist and electrical engineer, professor Alexander Stepanovich Popov.   Radio receivers are divided : according to the main purpose: broadcasting, television, coherent, direction-finding, radar, for radio control systems, measuring, etc. Under the receiving device understand the radio, equipped with an antenna, as well as the means of processing the received information and play it in the required form

1. did my friend enter the institute last year? my frien didn't enter the institute last year.
2. did the first lecture be­gin at 9 o'clock yesterday? the first lecture didn't be­gin at 9 o'clock yesterday.
3. did they spend much time at the swimming pool yesterday? they didn't spend much time at the swimming pool yesterday.
4. did our team win five gold medals last month? our team didn't win five gold medals last month.
5. did we pass our term examinations successfully last week? We didn't pass our term examinations successfully last week.