instruction:
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.
question:
Fish kills can occur when oxygen is less than ____ ppm.
answer:
three


question:
Infertility affects one in ____ couples today.
answer:
five


question:
Shanghai has a subtropical maritime climate, ____ distinct seasons and moderate rainfall.
answer:

four