In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Q: Terrorism is a problem which has troubled the international community for more than _ decades.

A: three
****
Q: Southern moles are six to seven inches long and weigh _ to four ounces.

A: three
****
Q: Most songbirds incubate their eggs for about _ weeks.

A:
two
****