instruction:
In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
question:
Postpartum blues are common during the _ months after childbirth.
answer:
three


question:
Conserved residues make similar contacts in _ repressor-operator complexes.
answer:
two


question:
Mothers suckle only their own babies, and the young stop nursing anywhere from _ to five months.
answer:

one