instruction:
In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
question:
Echocardiography demonstrates in clear, graphic fashion the _ cardiac chambers and four valves.
answer:
four


question:
Diarrhea is an illness that kills _ and one-half million children per year.
answer:
three


question:
Colds come and go in less than _ weeks.
answer:

two