Answer:
Here are the subordinate clauses in each of the provided sentences:
1) I went to the Royal Music Academy **after I enrolled in a course.**
2) He has laboured for long **since his rough hands indicate that.**
3) The books were very expensive **because we could not buy them.**
4) She has been given the correct medicine **so her condition will improve soon.**
5) I am interested in her life story **since it is an interesting one.**
6) The burglar was spotted by the watchman **when the watchman chased the burglar.**
7) The roads are out of bounds **because there has been heavy snowfall in the area.**
8) The Juhu beach is always crowded **although I like going there.**
Step-by-step explanation: