Although the lecture had already been on for five minutes,I was still not able to find a chair___
I remembered __________ the door before I left the office, but forgot to turn off the lights.
George returned after the war, only __________ that his wife had left him.
Having finished her project, she was invited by the school __________ to the new students.
Let those in need __________ that we will go all out to help them.
Birds' singing is sometimes a warning to other birds __________ away.