Ich ____ über seine Worte. A. erschrocken B. erschreckt C. erschrak Why the answer is C. Is erschrak any transformation of erschrecken? Why can not I find erschrak in a dictionary? Thanks.I find the imperfekt and perfekt of erschrecken are erschreckte and hat erschreckt respectively. Why are erschrak and erschrocken used here?

Why does it bother to add so many be-s before the verbs There are so many verbs meaning the same with or without prefix be-. Such as danken/bedanken, antworten/beantworten, eilen/beeilen, decken/bedecken etc. Why does it bother to add so many be- before the verbs if they mean the same after adding it. Maybe the usage of the verb has changed a little, but the main function of it keeps the same, doesn't it? I'm not complaining about it, I just find it very interesting. Anyone would like to explain that? Thanks

What is the most popular German website? Anyone would like to introduce me some German website? It's better to be popular or fun or interesting or unique... Thanks

about usage of an 1. Die Qualität der Waren ist für den Umsatz ___ großer Bedeutung. 2. Der Computer gewinnt seit Jahren im menschlichen Leben ___ Bedeutung. Both blanks are filled with an. Would you explain the meaning of these two sentences and why should an be used? Thanks...

Er ging ___ Hoffnung in die Prüfung. voller? What is the right case to be used here?

selbst und trotzdem? _____ im Wintet badet er mit kaltem Wasser. A. Selbst B. Trotzdem I chose B at first, but the answer turned out to be A. I know now selbst has the meaning of even though, but I don't know why trotzdem can not be used here. Pls give me some examples. Thanks

so und solch? What's the difference between them? I see 'so' more often, so etwas, so weit wie, so dass... But I see this sentence: Solch ein Mensch begegnet einem selten. Can solch here be replaced by so? If not, why? Thanks

Es sieht aus, als ob er nichts davon wüsste. What does this sentence mean. Would you pls explain "als","ob"and "wüsste" used here? Thanks.

Das in einem Buch gefundene alte Foto lässt sie wieder an ihre Jugend zurüch denken. Das in einem Buch gefundene alte Foto lässt sie wieder an ihre Jugend zurüch denken. Does it mean: The old photo found in a book reminded him of his youth again? Would you please explain denken an and zurücklassen used here? Thanks.