Native English speakers: grammar question

[Martin Moser]

Thanks all for your answers. Carlton has the correct answer as far as grammar as taught in schools in Germany is concerned ("Present Perfect doesn't go with time markers" as one hour ago, in the morning etc.). what is annoying though is that the teacher chose such a sentence for the test, especially when the very frist sentence in the book explaining the present perfect says that "present perfect expresses that an action or event that took place in the past is still of relevance in the present. Thus one could reason that obviously the leaving (in the past) is of relevance - since a pre-condition - to their not being back yet. Apart from the sentence being awkward ;-) )

Background is, we are looking for that one point he'd need to get the better grade :-P P

I was wondering who the hell, or what are, the Leinerts?

I'll gladly sell you the book, so you can find yourself :-) )