What problems we have on our earth? Global warming, floods, fires. But today i want to talk about theproblem with rubbish. People usually dont think about where to put the plastic bag or candy wrapper. Its very bad because people kill not only the environment, but themselves too! We can help our planet, if we think about this problem. You can put rubbish in a special bucket, if you cant see it, you should put it into your pocket, and find a bucket. To conclude, i hope people will understand, that the most problems, because of their irresponsibility.
2If I were invited, I would have come
3 If I were well prepared, I'd invite them to dinner
4 If I knew English, I would have found a better job
5 If you had been more careful, it would have passed this exam yesterday