Wales is famous for its green hills and beautiful valleys, isn't it?
2.1. I was waiting for my sister when it started to rain.
2.2. I suddenly realized that I had lost my wallet.
2.3. When they came to London, they visited many museums.
2.4 Cindy broke her leg while she was snowboarding.
2.5. Hardly we had finished dinner when the doorbell rang.
2.6. While we were waiting , we did crossword puzzles.
Здравствуйте. Здесь подходит первое предложение.
1.(1),2.(2),3.(1,1),4.(1,2),5.(1,2)