Question

2) This time yesterday
(lie) on the
beach
3) I saw Sid when I
(come) to work
this morning. He
(shop).
4) She
(meet) her husband while
she
(travel) in Egypt
5) While 1
(talk) to Mrs. Singleton
somebody
(walk) into my office and
(steal) the computer.
6) When Jack
(come) in everybody
(stop) talking
7) 1
(look) out of the window when I
(see) that we
(fly) over
the mountains​

Answer 1

3)I saw Sid when I came to work this morning.
4)She met her husband while she was traveling in Egypt
5)While I was talking to Mrs. Singleton somebody walked into my office and stole the computer
6)When Jack came in everybody stopped talking
7)I was looking out of the window when I saw that we were flying over the mountains

Answer 2

Resposta:

2) This time yesterday  I was lying  on the  beach

3) I saw Sid when I  was coming to work  this morning. He  shopped.

4) She met her husband while  she was traveling in Egypt.

5) While I was talking to Mrs. Singleton  somebody  walked into my office and  stole the computer.

6) When Jack  came in everybody  stopped talking.

7) I  was looking out of the window when I  saw that we  flew over  the mountains​

Explicação:

Past continuous - verbo descreve ações que estavam acontecendo no passado  quando outro fato no passado aconteceu.

John was driving when he saw David.

John estava dirigindo quando ele viu o David.

It was raining when Mary and Hellen arrived home.

Estava chovendo quando Mary e Hellen chegaram em casa.

Estrutura do past continuous

verbo to be passado (was - were) + verbo -ing + verbo passado

She  was studying when she saw the dog.

Ela estava estudando quando ela viu o cachorro.