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:
Fossil fuels come in ____ major forms coal, oil and natural gas.
answer:
three


question:
Deer mice have four toes on the forefeet and ____ toes on the hind feet.
answer:
five


question:
Mumps is contagious from ____ days before until nine days after the glands start swelling.
answer:

six