TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Rheas are brownish instead of black like the ostrich and have _ toes instead of two.

SOLUTION: three

PROBLEM: Anemone has _ vents.

SOLUTION: two

PROBLEM: Soil erosion is twice that of food-crops since _ weeds grow in tobacco fields.

SOLUTION:
no