In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Q: Cluster flies are covered with fine golden hairs and have _ stripes on the thorax.

A: no
****
Q: Thermal equilibrium occurs when _ bodies have the same temperature.

A: two
****
Q: Quadrille is dressage ridden by _ people simoultaneously.

A:
four
****