Not only John and Tom but also their sister, Mary, _______ great interest in the piano lessons.
Was it not until you began to write _____ you should have remembered more words?
Many people ____ building more nursing homes so that more serious can be taken care of.
The environmentalist at last reached _____ was once an industrial area where he did a field survey.
When my father and I traveled to Shanghai, he asked me to take a picture of him ______ stands the famous Oriental Pearl TV Tower.
If he ____ the book before, Jack would be able to tell us something about the story now.