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: Insects are identified by having ____ sets of paired legs, while isopods have seven.

A: three
****
Q: Calcite makes up ____ well known rocks limestone and marble.

A: two
****
Q: Spiders are different from insects, spiders have eight legs and insect only have ____ legs.

A:
six
****