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.

Q: Neuroblasts delaminate in five waves spanning approximately ____ hours.

A: three
****
Q: Cockroaches have six legs, ____ antennae and some have wings.

A: two
****
Q: Baby elephants are usually dependent on mother s milk for at least ____ years.

A:
three
****