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: Acoustic instruments consist of ____ main parts neck, top, back and sides.

A: four
****
Q: Orangutans spend up to ____ hours a day eating or foraging for food.

A: six
****
Q: Parthenogenetic teiids arise when ____ sexual species hybridize.

A:
two
****