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:
Pacific salmon leave their home stream, swim out to sea and return ____ to six years later to spawn.
answer:
one


question:
Aboriginal society is divided into ____ complementary branches.
answer:
two


question:
Mature plants produce ____ annual harvests in low fertility soil.
answer:

two