The milk must be preserved at this temperature until it ____.

You can’t imagine what great trouble the doctor had ______ the patient.

— I called you at ten, but there was no reply. —Oh, that was probably when I ________ a shower. 

 Don’t leave the chairs about, or you may ______ them at night.

When Peter __________ the car door, he found the key left in his car. So he had to call for help.