To match the gaps (1-4) with the sentences (A-F), we can analyze the context of the sentences based on the underlined words. Here’s how the gaps typically match up:

1. **A** - Refers to "Their owners can get online and send emails."
2. **B** - Refers to "Now they can get online easily using their mobile phones."
3. **D** - Refers to "In fact, they have become worse recently."
4. **F** - Refers to "Unfortunately, the company refused to bring it here."

Now, addressing the second part regarding the underlined words:

1. **refers to** owners (of the devices or services).
2. **refers to** devices/mobile phones (that allow online access).
3. **refers to** the lines/connectivity (which have worsened).
4. **refers to** a service or technology (that was requested).

If you need further assistance with this or something else, let me know!