instruction:
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.
question:
Most people become sick ____ to seven days after infection.
answer:
two


question:
Photosynthesis has ____ main sets of reactions.
answer:
two


question:
Bacteria reproduce by dividing to produce ____ new cells.
answer:

two