12. You know the material well enough, but you are very absent-minded
and that’s why you always make many mistakes. I f . . . .
13. We shall not go to see them because it is very late. If ... .
14. Naturally she was angry because you were in her way. I f . . . .
15. He always gets top marks in mathematics because it is his favourite
subject and he works a lot at it. I f ... .
1 6 .1 did not translate the article yesterday because I had no dictionary. If
17. We lost our way because the night was pitch-dark.
If. .. .
18. The box was so heavy that I could not carry it. That’s why I took a taxi.
If. . . .
19.1 had a bad headache yesterday, that’s why I did not come to see you. If
20. The ship was sailing near the coast, that’s why it struck a rock. I f ... .
21. He was not in town, therefore he was not present at our meeting. I f ... .
22. The pavement was so slippery that I fell and hurt my leg. I f ... .
23. They made a fire, and the frightened wolves ran away. I f ... .
24.
It is late, and I have to go home. I f . .. .
2 5 .1 was expecting my friend to come, that’s why I could not go to the
cinema with you. I f ... .
26. The sea is rough, and we cannot sail to the island. I f . ...
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