Решение #
1.Conan Doyle used to write history novels but he became popular/famous because of/by his detective/mystery stories.
2. Professor Black used to explore desserts so he knows a lot about (the) animals living there.
3. I used to read only science fiction or fairy tales and now I love adventure stories. 4. When I came to see my granny/came to my granny’s place I and my friends used to play hide-and- seek in the big cave. 5.What’s the matter?/What is it? You look upset.