During World War II, America _______ (to bomb) Nagasaki and Hiroshima.
bombed
Almost everyone ________ (to leave) for home by the time we arrived.
had left
By the time I got to the dentist, the pain in my tooth ________ (to stop).
had stopped
Jenny knew what to expect because it wasn't the first time she ................... (to give) blood.
had given