Complete using the past simple passive form of the verbs in the box: INVENT INVESTIGATE - BUY - EAT - FEED -CLEAN1. Those cdsby Lawrence2. All the windowsthis week.3. Her cakeby all the guests.many years ago.4. The telephone5. Hungry dogsby the shop assistants.6. This famous townby many scientists.​

1. Those CDs were bought by Lawrence.
Explanation: The verb "buy" is in the past simple passive form because we are talking about who bought the CDs, not who performed the action of buying.

2. All the windows were cleaned this week.
Explanation: The verb "clean" is in the past simple passive form because we are talking about who performed the action of cleaning the windows, not who did the cleaning.

3. Her cake was eaten by all the guests many years ago.
Explanation: The verb "eat" is in the past simple passive form because we are talking about who performed the action of eating the cake, not who ate it.

4. The telephone was invented many years ago.
Explanation: The verb "invent" is in the past simple passive form because we are talking about who performed the action of inventing the telephone, not who invented it.

5. Hungry dogs were fed by the shop assistants.
Explanation: The verb "feed" is in the past simple passive form because we are talking about who performed the action of feeding the hungry dogs, not who fed them.

6. This famous town was investigated by many scientists.
Explanation: The verb "investigate" is in the past simple passive form because we are talking about who performed the action of investigating the famous town, not who did the investigating.