Yes, you can.
When I am really interested in something I am doing, I feel tireless - I could stay on task for hours.
A drawbridge allows welcome guests into a castle to cross the moat(a trench of water that goes around the perimiter of the castle)
You use "in" when you mean "in" and you use "or" when you need to use "or". It is rather difficult to construct rules for the use of prepositions in most languages.The grammatical structure of the...