Question:
Multi-choice problem: Continue writing the next sentence for the following:

How to add nitrogen to compost
Add fresh grass clippings to the compost.
Collect the grass clippings left after you mow your lawn. Add the clippings in thin layers to the compost so that it doesn't clump up into big chunks.
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Answer:
Make sure that your grass clippings are fresh because dried grass clippings will add carbon to the compost. Add leafy plant clippings to the compost.

Question:
Multi-choice problem: Continue writing the next sentence for the following:

How to use salt as a cleaning agent
Mix salt and vinegar.
Vinegar is commonly used in household cleaning and can be combined with salt for extra stain removal power. Add some normal, distilled vinegar to a bowl.
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Answer:
Sprinkle it with an equal amount of salt and stir it into the vinegar. Soda water is a possible substitute for vinegar and can be used to clean and deodorize refrigerators.

Question:
Multi-choice problem: Continue writing the next sentence for the following:

How to prepare for a mathematical test on constructions
Always use new geometrical instruments.
It is very important to use only new instruments. It can be three to four years old, but not older than that.
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Answer:
Often, old instruments don't give accurate results, so it's better to buy a new one for yourself instead of using the one your mother or uncle used. Before buying a geometry box, check if it contains all the geometrical instruments you need.

Question:
Multi-choice problem: Continue writing the next sentence for the following:

A woman is holding onto a wind surfboard in the water. she
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Answer:
steps onto the board and starts wind surfing.