The only time that we _____ to do something like doing some volunteer work was in the city of Philadelphia.

One of my teachers ____ an Englishman.

When did you have your school trip?—______

So clearly ______ that I was able to understand much of what he said. [ ]

Your mother becomes more and more forgetful. —Yes. She searched for her cellphone for a whole day last Sunday but it ______ in her coat pocket the next day.