Перепишіть наступні речення з "if", а друге умовне.
For example: The reason we don`t use them is that they are so expensive. – But if they weren`t so expensive, we`d use them.
1)The reason I can`t contact them is that I haven`t got their address. But
2) The reason I work so hard is that I enjoy my job. But
3) The reason we are the market leaders is that we spend so much on R&D. But
4) The reason I can`t give you an answer is that I haven`t got the authority. But