The key to exercise solutions in chapter 6c - Grammar for the textbook On Screen B2 - Workbook & Grammar with authors Virginia Evans and Jenny Dooley from Express Publishing
Question
Make conditional sentences, as in the example.
Answer
If the Internet connection wasn't down, I could send the files.
If you leave your laptop on over night, it could overheat.
If Maria had checked her account, she would have seen the email.
If Penny had a newer PC, she would be able to play the new games on it. / If Penny's PC wasn't so old, she would be able to play the new games on it.