Обрадуйте условные предложения . 40 13. he always gets top marks in mathematics because it is his favourite subject and he works a lot at it. if . 14. i didn't translate the article yesterday because i had no dictionary. if . 15. we lost our way because the night was pitch-dark. if . 16. the box was so heavy that i couldn't carry it. that's why i took a taxi. if ..

13 If mathematics wasn't his favourite subject, he wouldn't always get top marks in it 
14 If i had had a dictionary, I would have translated the article
15 If the night hadn't been pitch-dark, we wouldn't have lost our way
16 If the box hadn't been so heavy, I could have carried it and I wouldn't have taken a taxi.