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.
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Question: Corporate mergers occur when ____ companies combine.

Answer: two


Question: World population continues to rise, even as a few countries move toward ____ growth.

Answer: zero


Question: Risk premium is a factor for individuals, but in the whole economy it is a ____ sum.

Answer:
zero