Question

What change is needed in sentence 9?

Because they learned from their mistakes, that encouraged them to continue to work hard and succeed at inventing one of todays most convenient inventions, the airplane.


Change todays to today's


Delete the comma after mistakes


Change their to there


Change encouraged to encourage

Answer 1

change todays to today’s

Answer 2

the answer should be change todays to today’s . that’s not even a word