Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

[Q]: Photons have ____ mass and no electrical charge.
[A]: no


[Q]: Many biologists believe the sandhill has been virtually unchanged for ____ million years.
[A]: nine


[Q]: Plastic containers cause syrup to darken after only ____ months of storage.
[A]:
three