13. Choose the suitable translation of the sentences: С двух до пяти он сидел в своей комнате. a) From 2 till 5 o'clock he sits in his room. b) From 2 till 5 o'clock he was sitting in his room. c) From 2 till 5 o'clock he is sitting in his room. d) From 2 till 5 o'clock he sat in his room.

The correct translation is:

1. From 2 till 5 o'clock he was sitting in his room.

Explanation: The Russian verb 'сидел' is in the past tense, and the phrase 'с двух до пяти' indicates a continuous action over a period of time in the past. Therefore, the Past Continuous tense ('was sitting') is the most appropriate translation. Option 'a' and 'c' use the present tense, and option 'd' uses the simple past tense, which might imply a completed action rather than a duration.