Final answer:
The correct simple past tense forms are 'was' and 'were' for different subjects.
Explanation:
The correct options in simple past tense are:
- I was in Manta last week.
- Marilyn, Charlie, and Max were at school last Friday.
- They were at the cinema yesterday.
- You were very busy this morning.
Learn more about Grammar and Verb Tenses here:
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