A couple of quick notes on homework #2.
First off: This is potentially a rather tricky one to do if you aren’t a native speaker of English. However, you are in principle not being graded on how native-like your English judgments are. The point of this homework is really to know how to apply the tests. If you can construct the sentence that you would test with a native speaker of English, that’s the main thing.
That said, it’s still important for the later parts to have categorized things as being constituents or not. For the most part, I think the judgments are likely to be available even if you aren’t a native speaker of English. But for those that you are not sure about, the best thing would be to find a native English speaker and ask for an opinion on the sentences. If this proves difficult, you can email me for judgments or stop by my office hours.
Point #2: In part 1, (c), you are asked whether from Greece is a constituent in the sentence. This one is tricky, particularly if you don’t feel comfortable with the (archaic) thence and whence that I’d suggested trying here. For this one, I’d say: the clefting test is probably the most reliable. The other tests will be hard to run, and might be misleading. So, even if you get a different result for all but the clefting test, assume that the result of the clefting test is the right one.