Question

read the paragraph.
nora often found it hard to predict how long her homework would take. that made it difficult for her to know if she could make plans with her friends. one week, she greatly underestimated how long it would take to write her history essay. she thought it would take an hour, but it actually took much more time. the next week, she planned more time for homework and finished earlier.
which sentence from the paragraph is the best clue to the meaning of underestimated?
the next week, she planned more time for homework and finished earlier.
that made it difficult for her to know if she could make plans with her friends.
she thought it would take an hour, but it actually took much more time.
nora often found it hard to predict how long her homework would take.

Explanation:

The word "underestimated" means to judge something as being less than it actually is. The sentence "She thought it would take an hour, but it actually took much more time" shows a contrast between what was thought (an hour) and what actually happened (much more time), which directly illustrates the meaning of underestimating.

Answer:

She thought it would take an hour, but it actually took much more time.