whether they had financial support
what he said
What others doubted
if their airplane would fly or not
when he would complete it
what the future holds
Edison stated that he had invented the light bulb, but he had no actual evidence for it, so scientists doubted ...
Some people have trouble believing that new ideas are possible, but they certainly are. So we should not say for sure about ...
Wilbur himself could not predict .....
...... was that whether it was possible to fly.
Edison did not have a schedule for his projects, so no one knew ...
The Wright brothers faced many obstacles. While the success of inventors often depended on ..., the Wright brothers actually had none.
