Read the following dialogue and fill the blank.

Betsy: I called you up yesterday afternoon, but you didn’t answer. Where were you?

Brian: I was in another room when you called. I didn’t hear the phone ringing until it was too late.

Betsy: _____________ (1)

Brian: I was photocopying a report that I needed to send to a client. What were you doing when you telephoned?

Betsy: _____________ (2) and couldn’t find him. Do you know where he was?

Brian: Tom was driving to a meeting.

The best sentence to fill the blank in number (1) is ...