TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Every cell has _ long flagella.

SOLUTION: two

PROBLEM: Liquids usually descend in three to five seconds, and solids in _ to twenty seconds.

SOLUTION: eight

PROBLEM: Sharks also have gill slits on their heads rather than gill covers - typically _ on each side.

SOLUTION:
five