i think the first one is right but i dont really know. pls help with all :)
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Answer:
1. Je mange un sandwich.
2. Vous aimez le rock.
3. Pierre joue au foot.
4. Nous invitons des amis.
5. Tu habites à Lyon?
6. Elle parle français?
7. Ils téléphonent à des amis.
The first one is incorrect because suis means am. So, "je suis" means "I am."
Hope it helped!