Verb conjugation of "extol" in English

Work was performed only in June, July, August and September. In October and November, Erik has been waiting for Katja's visit and Sabine was on maternal leave after Christmas and New Year.
Are you currently buried in a lot of work? I am not, because the financial crisis has put me back on hold. I do not work, so I have time for going out in the evening and being online.
Have you ever visited the U.S. before and if so, where have you been in the U.S.? I've been travelling in California, it was very amazing. We have traveled by car. Here are my corrections.