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:
Buses are ____ times as fuel efficient as cars.
answer:
five


question:
Acoustic instruments consist of ____ main parts neck, top, back and sides.
answer:
four


question:
Earthquakes produce ____ different types of seismic waves.
answer:

three