My computer broke down, so i ________ continue my work.

Solution (By Examveda Team)

Option A: Couldn't been
This option is grammatically incorrect because "couldn't been" is not a proper verb form.

Option B: Could not
This is the correct option. "Could not" is the appropriate past tense form to indicate that the computer's breakdown prevented the continuation of work.

Option C: Carwas not
This option is incorrect and irrelevant as "carwas" is not a word, and it does not fit the context of the sentence.

Option D: Can't be
This option is incorrect because "can't be" is not in the correct tense to match "broke down." The sentence requires a past tense form.

In conclusion, the correct answer is Option B: Could not, as it correctly conveys the inability to continue work due to the computer breaking down.