Ответ:

2) ...while I was doing my homework.

3) ...when we were talking.

4) ...while she was reading.

5) ... but nobody was watching it.

1. Matt phoned while we were having dinner. Мэт сделал звонок, пока мы обедали

2.

The doorbell rang while I was having a shower.(Дверной звонок зазвонил, когда я принимал душ.)

3

the car began to make a strange noise when we started going(машина начала издавать странный шум, когда мы начали ехать)

4.Jessica fell asleep while she was talking(Джессика уснула, разговаривая по телефону)

5.

The television was on, but nobody was watching.

(Телевизор был включен, но никто не смотрел.)