Correct the errors in coordination. Please give me the answers I need hel

We worked all night, so we didn’t meet our deadline.

I finished the coffee, it was bitter.

My study group worked hard, that we finished the project early.
The lake was closed due to contamination but people were still walking along the shoreline.

Neither my sister nor parents is here.

1. We worked all night, yet we didn't meet the deadline.

2. I drank the coffee, but it was bitter.

3. Their study group worked hard, so they finished the project early.

4. The lake was closed due to contamination, but people were still walking along the shoreline.

5. Neither my sister nor my parents are here.

Explanation:

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the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

i can you there : )