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.

Q: Teething begins for most babies around ____ to six months.

A: four
****
Q: Many biologists believe the sandhill has been virtually unchanged for ____ million years.

A: nine
****
Q: All bacteria reproduce by dividing into ____ cells.

A:
two
****