The young man insisted that he _________ nothing wrong and __________ free.
—Mary broke up with me! —You_ _have forgotten about the Valentine's Day.
Have you considered how weak humans area volcano, hurricane or earthquake?
Can you explain ________ the sun goes down in the west?
—Someone has tidied the sitting room! —Jim __ it this morning; he couldn't bear the mess any more.
Peterson used to work in a remote mountain village school, which is only on foot.