1. While Tom was reading, Amely was watching a docunentary on TV.

2. Marvin came home, switched on the computer and checked his emails.

3. The thief snuck into the house, stole the jewels and left without a trace.

4. Nobody was listening while the teacher was explaining the tenses.

5. While we was doing a sight-seeing tour, our friends were lying on the beach.

6. He woke up and looked at his watch.

7. They has cleaned the car. It looks new again.

8. I haven't seen Peter since I arrived last Tuesday.

9. The receptionist welcomed the guests and asked them to fill in the form.

10. The car broke down and he had to walked home.

1. is watching.

2. come , switched and checked .

3. snuck , steal and left .

4. was listening , was explaining.

5. was doing , were lying .

6. wake .

7. have cleaned .

8. haven't seen , arrived.

9. welcome  and ask .

10. break  and have .