c) Past Simple или Past Continuous.
18. When he (to paint) the wall, he (to use) scaffolding.
19. When I (to sit) in the office, I suddenly (to see) my old friend.
20. When Nick (to draft) a plan, his computer (to crash).
9. I (to sign) the contract when my boss (to open) the door.
d) Past Simple или Past Perfect.
When they (to enter) the hall, the conference already (to begin).
The teacher (to understand) that Helen (not to do) her homework.
He (to think) that he (to lose) the money.
Leo (to say) that he (to get) his education in Cape Town.
By the time we (to come) to see him, he (to return) home.
When his co-worker (to leave), he (to hurry) to the station to book a ticket.
e) Past Simple, Past Continuous. и Past Perfect.
1. When he (to enter) the room, his colleagues (to discuss) the plan which he (to make up) in the morning.
2. I (to sit) in an armchair and (to think) of my coming business trip when the door suddenly (to open) and an old friend of mine (to enter) the room.
3. He (to ask) me if I (can) give him your e-mail address.
4. She (to say) that he (to give) her the wrong address.
5. When I (to ring) up Mike, he still (to learn) the rule which he (to begin) learning at school.
6. I (to ask) him where he (to put) my letter.