Solution:
Here's the matching of words to definitions:
- F. jammers — devices that block phone signals
- E. queries — requests for information
- B. unplugged — disconnected from a power supply
- D. travel agents — businesses that organise holidays and trips
- C. available — able to be used
- A. blackout — a period when electricity stops working
Answer: 1-F, 2-E, 3-B, 4-D, 5-C, 6-A.