The pair of shoes __________ worn out.
—Excuse me, sir. Would you do me a favor?—Of course. What is it?—I ________ if you could tell me how to fill out this form.
—Which flight ________ ? —I want to catch the 13:00.
—You must have met him the other day. —Oh, no, I ________ .
— Have you ever worked with a tape recorder?— I ________ it a lot when I was studying French in school.
— I called you at ten, but there was no reply. —Oh, that was probably when I ________ a shower.