. He has left his book here on _____, so that you can read it.
Who ________ a theory about black holes?
---How about your journey to Mount Emei? ---Everything was wonderful except that our car ________ twice on the way.
I feel it is your husband who ________ for the spoiled child.
Only when the war was over ________ return to their hometowns.
We tried to find a table for seven, but they were all ________.