1 . All the people in the world have taken action to prevent the COVID-19 from ________. (spread) (所给词的适当形式填空)

2 . TED is a non-profit organization devoted to ideas worth _________(spread). （所给词的适当形式填空）

3 . From 1830 to early 20^th century, the Industrial Revolution______________(蔓延，扩散)through Europe and the US and then to other countries such as Japan. (根据汉语提示单词拼写)