TASK DEFINITION: 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.
PROBLEM: Zygospores result from the fusion of ____ similar hyphal elements.

SOLUTION: two

PROBLEM: Background color can be a transition of ____ colors.

SOLUTION: two

PROBLEM: Cognitive therapy is a time-limited treatment lasting ____ to four months.

SOLUTION:
three