Find the mistake in each of the following sentences, then write them correctly :
-1 She found a valuable gold ring that she had lost last week
2- - He is lazy rather than stupid / He is lazier than being stupid
3- the climber had lost his footing but he kept his cool
4- climbers want to climb even after accidents/ every accident because they love the experiment and the challenge of it
5- The Beatles was successful pop group in the 1960s
6- Maha speaks the most fluently
7- the humming bird is one of the small birds we know of
8- this book is as interesting as the other one